Our Dress Has To Go Viral. Amanda has been obsessing over a Randy Fenoli dress, but will it live up to the hype? Kindra and her pastor mother can't agree on a suitable dress.

Ugly Duckling. After transitioning, Chloe hopes to find a dress that makes her feel like her true self. Country singer Jenny needs a dress that suits her snowy wedding vision.

Teleshopping.

Teleshopping.

Fight To The Finish. When Molly gets angry with Mike for not listening to her vent about writing with Peggy, they go their separate ways for a day.

Near Death Do Us Part. After Carl has a near-death experience while on duty, he tells Mike he's going to propose to Victoria. But can Mike keep a secret?

The Bitter Man And The Sea. Mike and Molly are forced to 'uninvite' Carl to their anniversary cruise following his nasty breakup with Victoria.

A Patch, A Modem And A Zantac. After being dismissed in class, Sheldon is determined to prove a visiting NASA representative wrong and starts studying theoretical physics.

A Brisket, Voodoo And Cannonball Run. Meemaw refuses to give George Sr. her brisket recipe. The kids try to think of ways to resolve this family feud.

Cape Canaveral. George takes his sons to see a space shuttle launch. Meanwhile, Mary, Meemaw and Missy have a girl's night at the salon.

The Euclid Alternative. An intervention is used to try to force Sheldon to overcome his fear of driving.

The Cooper-Nowitzki Theorem. Sheldon and his friends are mystified when a younger undergraduate student is attracted to him.

The Panty Pinata Polarization. When Sheldon bans Penny from the apartment, she decides to retaliate. Howard and Raj search for the America's Next Top Model house.

The Lizard-Spock Expansion. Sheldon wants to use an alternate version of rock-paper-scissors to help resolve conflicts. A girl Wolowitz has a major crush on falls for Leonard.

The White Asparagus Triangulation. Sheldon is over-exuberant that Leonard finally has a girlfriend matching his high standards.

The Vartabedian Conundrum. Leonard seeks Penny's counsel when his relationship with Stephanie takes. Sheldon's hypochondriac tendencies get the better of him.

The Bath Item Gift Hypothesis. Sheldon irks the gangs with his obsession with proper Christmas gift protocol. Leonard's crushed when Penny dates a colleague of his.

The Killer Robot Instability. Penny's criticism of Wolowitz's romantic life pushes him into depression and AWOL for a fighting robot battle the guys are depending on him for.

Cops On The Rocks. Mike and Carl decide to go to couples counselling to try and reconcile their partnership. Plus, Molly decides to do a promotional radio interview.

One Small Step For Mike. Molly has high hopes that a fitness tracking device will encourage Mike to be more active. But Mike has other plans for it.

Peg O' My Heart Attack. After Peg suffers a heart attack after a heated argument with Molly, Mike blames his wife, who immediately sets out to make amends.

Spock, Kirk And Testicular Hernia. George Sr. makes a deal with Sheldon to tutor his brother when Georgie's poor grades threaten his place on the football team.

Eagle Feather, String Bean. Sheldon interviews with a school for gifted children. Much to their surprise, the rest of the family struggle with his absence.

Demons, Sunday School. A worried Mary sends Sheldon to Sunday school after she finds him playing Dungeons & Dragons with Tam and Billy.

The Friendship Algorithim. Looking to get friendly with Barry Kripke to gain access to a piece of high-tech lab equipment, Sheldon develops a flowchart process to make friends.

The Financial Permeability. When Sheldon loans money to Penny so she can pay her rent, it leads to Leonard coming face-to-face with her ex, Kurt.

The Maternal Capacitance. A visit from Leonard's mother ends up bringing him and Penny closer.

The Cushion Saturation. Paintball leads to a squabble between Sheldon and Penny as well as romance between Howard and Leslie.

The Terminator Decoupling. The gang is thrilled to see Summer Glau is also aboard their train to San Francisco. Sheldon frets over having forgotten a paper he wants to present.

The Work Song Nanocluster. Penny's business selling hair accessories out of her apartment gets out of hand when an over-caffeinated Sheldon takes charge.

The Dead Hooker Juxtaposition. Penny feels threatened when another sexy woman moves into the apartment building and angered when she senses the guys are being taken advantage of.

The Hofstadter Isotope. A fellow comic book enthusiast's hitting on Penny leads to Leonard, Raj and Howard going to a bar's Ladies' Night.

The Act Of Tinseling. Pedro tells Liz he worries Sophie isn't ready for a relationship. Cortney and Colt still have intimacy issues, as she wonders about his intentions.

Why I Want To Be A Monogamist. Christine and David visit Janelle. Kody and Robyn discuss their now monogamist relationship and the possibility of bringing in a new wife.

To Get A Diagnosis Is Everything. Ryan has excruciating sores in his groin and a cyst on his neck. Dr Emma delivers a diagnosis, but he must give up smoking to finally recover.

Crazy, Stupid, Lump. Jess is looking for love but has a giant bump on his neck. Former NFL defensive tackle, Marcell Dareus, hopes Dr. Lee can tackle his forehead lipoma.

California Bumpin'. Brent has a tricep bump that could be intertwined in his muscle. Plus, Jeb avoids the beach because of the massive number of bumps all over his body.

Bettie Jo's Story. At just 24, Bettie Jo is eating her way towards 700-lbs. Housebound, she is reliant on her husband for even basic needs. But can she shed the pounds?

Joe's Story. Joe is only 30, and trapped in an 800-lb body. He lost his job and is mostly housebound. Can Joe find the strength to face his past and save his life?

Thank You, Next. ICU nurse Isabella is hoping her final look will come together just days before her wedding. Plus, LaQuesha is determined to find two blingy dresses!

Mom, You've Said Just Enough. Christie loves plunging necklines, but her mum doesn't want anything too revealing. Monique is so picky that she has Mindy and Randy both stumped.

Teleshopping.

Teleshopping.

Cops On The Rocks. Mike and Carl decide to go to couples counselling to try and reconcile their partnership. Plus, Molly decides to do a promotional radio interview.

One Small Step For Mike. Molly has high hopes that a fitness tracking device will encourage Mike to be more active. But Mike has other plans for it.

Peg O' My Heart Attack. After Peg suffers a heart attack after a heated argument with Molly, Mike blames his wife, who immediately sets out to make amends.

Spock, Kirk And Testicular Hernia. George Sr. makes a deal with Sheldon to tutor his brother when Georgie's poor grades threaten his place on the football team.

Eagle Feather, String Bean. Sheldon interviews with a school for gifted children. Much to their surprise, the rest of the family struggle with his absence.

Demons, Sunday School. A worried Mary sends Sheldon to Sunday school after she finds him playing Dungeons & Dragons with Tam and Billy.

The Friendship Algorithim. Looking to get friendly with Barry Kripke to gain access to a piece of high-tech lab equipment, Sheldon develops a flowchart process to make friends.

The Financial Permeability. When Sheldon loans money to Penny so she can pay her rent, it leads to Leonard coming face-to-face with her ex, Kurt.

The Maternal Capacitance. A visit from Leonard's mother ends up bringing him and Penny closer.

The Cushion Saturation. Paintball leads to a squabble between Sheldon and Penny as well as romance between Howard and Leslie.

The Terminator Decoupling. The gang is thrilled to see Summer Glau is also aboard their train to San Francisco. Sheldon frets over having forgotten a paper he wants to present.

The Work Song Nanocluster. Penny's business selling hair accessories out of her apartment gets out of hand when an over-caffeinated Sheldon takes charge.

The Dead Hooker Juxtaposition. Penny feels threatened when another sexy woman moves into the apartment building and angered when she senses the guys are being taken advantage of.

The Hofstadter Isotope. A fellow comic book enthusiast's hitting on Penny leads to Leonard, Raj and Howard going to a bar's Ladies' Night.

Super Cop. Mike becomes hyper-vigilant after his wallet is stolen from the squad car while taking a nap.

Joyce's Will Be Done. Molly is shocked when Joyce reveals she's leaving the house to Victoria in her will.

The Good Wife. Molly's leisure activities between novels become an issue for Mike. Tensions rise as he wants her to be the perfect homemaker.

A Computer, A Plastic Pony. Sheldon asking for a computer has unforeseen consequences for his parents, prompting Mary and the twins to move in with Meemaw.

A Sneeze, Detention. Sheldon's germophobia lands him in detention when flu season hits Medford and he takes extreme measures to remain healthy.

Potato Salad, A Broomstick. When Mary takes a job at the church, Sheldon and Missy are left home alone for the very first time.

Penny's.

Classified Material Turbulence. Stuart asks Leonard's advice for a date with Penny. Wolowitz realises there's an error in a toilet he designed for the International Space Station.

The Monopolar Expedition. The guys receive a prestigious offer to work over the summer at the North Pole, and Penny's resultant behaviour leaves Leonard unsure if he should go.

The Electric Can Opener. Discovering Leonard, Raj and Howard fudged the results of his Arctic research expedition, a disgraced Sheldon heads home to Texas.

The Jiminy Conjecture. Sheldon and Howard wager comic books over a cricket's species. Meanwhile, a less-than-perfect romantic night agonizes Leonard and Penny.

The Gothowitz Deviation. Howard takes Raj along to check out the Goth dating scene. Sheldon uses chocolate as part of a behaviour modification experiment on Penny.

The Pirate Solution. Facing a return to India, Raj needs a job desperately enough to consider working for Sheldon. Howard becomes a third wheel to Leonard and Penny.

Creepy Candy Coating Corollary. Sheldon looks forward to squaring off against a Star Trek actor in a fantasy card game tournament. Wolowitz cashes in on an old pact with Leonard.

Please Remain Seated. Forrest and Sheena's families meet. Jovon and Annalynn don't see eye to eye. Laura grows suspicious of Birkan. Rick is unsure about having more kids.

McAllister Auto Loves The Ladies. Jim feels ganged up on when Georgie and Audrey make changes to the tire store, and Mandy helps Georgie navigate a fight between her parents.

A Sportsbook And A Breakup. Mandy finds out Meemaw runs an illegal sportsbook and wants in on the action. Meanwhile, Georgie struggles to keep Mandy's new job a secret.

Quadripple Nipple. Don has a case of crippling psoriasis that has completely taken over his body. Jeff has a huge growth over his spine that looks like a hunchback.

Dr. Pimple Popper. Angelina's huge chest lump affects her love life and Delano has a football-sized mass on his back. Plus, Carla hopes to get painful cysts removed from her scalp.

Angel's Story. At 42 years old, Angel is staring death in the face. She is struggling to make a positive change and be an active part of her partner and son's lives.

Charity's Story. Suffering from flesh-eating bacteria and weighing almost 800-lbs, Charity relies on her family. When bad news threatens her weight loss can she carry on?

Kleinfeld, Here I Come! Morgan worries her mum will reject her dress three months before her wedding. Elaina must take back control of her appointment from her bossy sister.

A Season of Surprises. Brides have high expectations and occasionally there are shocking moments in the salon. Randy looks back at some of the best moments this season.

Teleshopping.

Teleshopping.

A Clogged Pore. Sheldon struggles with the first signs of puberty while his parents hunt for new jobs, and Georgie and Meemaw take a business trip across the border.

Pilot. Nine-year-old Sheldon learns that his high intelligence isn't always helpful growing up in East Texas, where church and football are king.

Rockets, Dewey Decimal System. To appease his worried mother, Sheldon employs the techniques of a self-help book to try and make a friend.

Poker, Faith And Eggs. When George Sr. is rushed to the emergency room, Meemaw comes to babysit. And the kids have an adventure getting to the hospital on their own.

A Therapist, A Comic Book. Sheldon refuses to eat solid food after a choking scare but finds solace in a new interest after he discovers comic books.

A Solar Calculator, A Game Ball. Sheldon uses his statistics skills to help his father coach the football team. Both Sheldon and Georgie struggle with the popularity this brings.

McAllister Auto Loves The Ladies. Jim feels ganged up on when Georgie and Audrey make changes to the tire store, and Mandy helps Georgie navigate a fight between her parents.

A Sportsbook And A Breakup. Mandy finds out Meemaw runs an illegal sportsbook and wants in on the action. Meanwhile, Georgie struggles to keep Mandy's new job a secret.

The Middle Earth Paradigm. Penny hosts a Halloween party, putting Leonard, Sheldon, Wolowitz and Koothrappali through a new test of their social skills.

The Dumpling Paradox. When Wolowitz goes AWOL with one of her friends, Penny's recruited to fill in for him on the guys' Halo team.

The Grasshopper Experiment. Raj's parents set him up on a blind date, and when he discovers he can talk to her, she shows interest in Sheldon.

Cooper-Hofstadter Polarization. When they're invited to present at a physics conference, Sheldon's reluctance to share the credit leads to a tiff between him and Leonard.

The Loobenfeld Decay. Leonard and Sheldon each lie to avoid hearing Penny sing in a production of Rent. However, Sheldon's lie becomes a bit too complicated.

The Pancake Batter Anomaly. With his friends knowing how sour he acts when sick and avoiding him as a result, Sheldon is nursed by Penny, who hasn't a clue what she's in for.

The Jerusalem Duality. With Sheldon rattled after meeting Dennis, a teen physicist who's smarter than he is, the rest of the guys search for a way to eliminate the threat.

The Bat Jar Conjecture. Sheldon finds himself booted from the gang's Physics Bowl team and replaced with Leslie, so he forms his own team hoping to prove he's superior.

The Nerdvana Annihilation. When the delivery of a full-size prop of 1960's 'The Time Machine' causes Penny to miss work, she scolds Leonard about his sci-fi collectibles.

The Pork Chop Indeterminacy. The gang fall for Sheldon's twin sister, and Leonard's plan to win her heart is derailed when Sheldon declares he'll decide who can date her.

The Peanut Reaction. Penny wants to throw a surprise party for Leonard, but Sheldon's indulgence at an electronics store throws her off-track.

The Tangerine Factor. Penny's breakup spurs Leonard to summon the courage to ask her out, and they both go to Sheldon for advice on their upcoming date.

The Bad Fish Paradigm. Penny opens up to Sheldon after a less-than-stellar first date with Leonard, placing him in the uncomfortable position of having to keep a secret.

The Codpiece Topology. Seeing Penny with another guy sends Leonard back to Leslie Winkle, much to Sheldon's dismay.

The Barbarian Sublimation. Penny becomes addicted to an online game based on the world of Conan the Barbarian and persistently pesters Sheldon for advice.

The Griffin Equivalency. Full of confidence following being named one of People's 30 to Watch Under 30, Raj hits on Penny and becomes impossibly arrogant.

The Euclid Alternative. An intervention is used to try to force Sheldon to overcome his fear of driving.

The Cooper-Nowitzki Theorem. Sheldon and his friends are mystified when a younger undergraduate student is attracted to him.

The Panty Pinata Polarization. When Sheldon bans Penny from the apartment, she decides to retaliate. Howard and Raj search for the America's Next Top Model house.

The Lizard-Spock Expansion. Sheldon wants to use an alternate version of rock-paper-scissors to help resolve conflicts. A girl Wolowitz has a major crush on falls for Leonard.

Dara Ó Briain introduces topical chat and laugh out loud games with guests Rhys James, Ed Byrne, Glenn Moore, Sara Pascoe and Emmanuel Sonubi.

Soon-to-be-married Peter's lack of male friends prompts him to undertake a quest to find true 'bromance' so he can have a best man at the wedding.

A Patch, A Modem And A Zantac. After being dismissed in class, Sheldon is determined to prove a visiting NASA representative wrong and starts studying theoretical physics.

A Brisket, Voodoo And Cannonball Run. Meemaw refuses to give George Sr. her brisket recipe. The kids try to think of ways to resolve this family feud.

The Lipoma Whisperer. Melissa covered her huge lipoma with a sweatshirt for years. Tyler's fear of cancer stopped his head lumps being diagnosed and Tahj is covered in painful boils.

Laura's Story. Laura has used food to cope with her emotions for too long. Confined to a wheelchair, she depends upon her husband and mother to survive. Can she turn her life around?

Marla's Story. Marla is so heavy she cannot stand up. Bedridden, she must face the facts about her health and the toll it takes on her supportive family, if she is to save her health.

From Snickers Bar To Caviar. Kerry's outrageous entourage keeps stealing her spotlight! Gretchen needs a gown all four of her sisters will love, and Alex questions her dress choice.

Is Anyone Listening To Me? Kayla's family threatens to take over her appointment. Milan considers getting a customised dress. Prashanthi's fitting doesn't go according to plan.

Teleshopping.

Teleshopping.

Cape Canaveral. George takes his sons to see a space shuttle launch. Meanwhile, Mary, Meemaw and Missy have a girl's night at the salon.

Spock, Kirk And Testicular Hernia. George Sr. makes a deal with Sheldon to tutor his brother when Georgie's poor grades threaten his place on the football team.

Eagle Feather, String Bean. Sheldon interviews with a school for gifted children. Much to their surprise, the rest of the family struggle with his absence.

Demons, Sunday School. A worried Mary sends Sheldon to Sunday school after she finds him playing Dungeons & Dragons with Tam and Billy.

A Computer, A Plastic Pony. Sheldon asking for a computer has unforeseen consequences for his parents, prompting Mary and the twins to move in with Meemaw.

A Sneeze, Detention. Sheldon's germophobia lands him in detention when flu season hits Medford and he takes extreme measures to remain healthy.

The White Asparagus Triangulation. Sheldon is over-exuberant that Leonard finally has a girlfriend matching his high standards.

The Vartabedian Conundrum. Leonard seeks Penny's counsel when his relationship with Stephanie takes. Sheldon's hypochondriac tendencies get the better of him.

The Bath Item Gift Hypothesis. Sheldon irks the gangs with his obsession with proper Christmas gift protocol. Leonard's crushed when Penny dates a colleague of his.

The Killer Robot Instability. Penny's criticism of Wolowitz's romantic life pushes him into depression and AWOL for a fighting robot battle the guys are depending on him for.

The Friendship Algorithim. Looking to get friendly with Barry Kripke to gain access to a piece of high-tech lab equipment, Sheldon develops a flowchart process to make friends.

The Financial Permeability. When Sheldon loans money to Penny so she can pay her rent, it leads to Leonard coming face-to-face with her ex, Kurt.

The Maternal Capacitance. A visit from Leonard's mother ends up bringing him and Penny closer.

The Cushion Saturation. Paintball leads to a squabble between Sheldon and Penny as well as romance between Howard and Leslie.

The Terminator Decoupling. The gang is thrilled to see Summer Glau is also aboard their train to San Francisco. Sheldon frets over having forgotten a paper he wants to present.

The Work Song Nanocluster. Penny's business selling hair accessories out of her apartment gets out of hand when an over-caffeinated Sheldon takes charge.

The Dead Hooker Juxtaposition. Penny feels threatened when another sexy woman moves into the apartment building and angered when she senses the guys are being taken advantage of.

The Hofstadter Isotope. A fellow comic book enthusiast's hitting on Penny leads to Leonard, Raj and Howard going to a bar's Ladies' Night.

Penny's.

Classified Material Turbulence. Stuart asks Leonard's advice for a date with Penny. Wolowitz realises there's an error in a toilet he designed for the International Space Station.

The Monopolar Expedition. The guys receive a prestigious offer to work over the summer at the North Pole, and Penny's resultant behaviour leaves Leonard unsure if he should go.

The Electric Can Opener. Discovering Leonard, Raj and Howard fudged the results of his Arctic research expedition, a disgraced Sheldon heads home to Texas.

The Jiminy Conjecture. Sheldon and Howard wager comic books over a cricket's species. Meanwhile, a less-than-perfect romantic night agonizes Leonard and Penny.

The Gothowitz Deviation. Howard takes Raj along to check out the Goth dating scene. Sheldon uses chocolate as part of a behaviour modification experiment on Penny.

The Pirate Solution. Facing a return to India, Raj needs a job desperately enough to consider working for Sheldon. Howard becomes a third wheel to Leonard and Penny.

Creepy Candy Coating Corollary. Sheldon looks forward to squaring off against a Star Trek actor in a fantasy card game tournament. Wolowitz cashes in on an old pact with Leonard.

Goddess Of The Music Store. Georgie helps Connor impress his new crush, while Mandy, Audrey and Jim struggle to butt out of Connor's love life.

Baby Fight! Georgie and Mandy worry they're not on the same page when they disagree about having another kid, and Mary, Jim and Audrey struggle to stay out of it.

In the satirical panel show with a standup twist, Dara Ó Briain hosts as two teams of top comedians battle to poke fun at the week's news.

Dara Ó Briain introduces topical chat and laugh out loud games with guests Rhys James, Ed Byrne, Glenn Moore, Sara Pascoe and Emmanuel Sonubi.

Bright Ideas. Guz transforms his with new lights and under glow, jumps into a turbo Micra thrill ride, and explores bold builds from across the modding world.

Potato Salad, A Broomstick. When Mary takes a job at the church, Sheldon and Missy are left home alone for the very first time.

The World's Largest Lump. Ronen has a huge but mysterious lump above his knee. Meanwhile Amber is suffering from a debilitating skin disease no one understands.

Southern Mamas Are Hard Y'All. Holly wants to look like a princess but her mum and grandma have another vision. Plus, Lauren has yet to lay eyes on her custom-made ball gown.

Chay's Story. To cope with the emotional turmoil of his childhood, 23-year-old Chay has eaten his way to 600-lbs - and it's threatening to kill him before turning 30.

Nikki's Story. Lifelong secret eater Nikki is threatened by immobility as her weight climbs to 650-lbs. She has a gastric bypass and confronts the emotional causes for her eating.

Diva With A Capital D. Emerald tries to convince her mum to let her double her dress budget! Singer Jillian looks to her dad for approval and Elaina's returns for her fitting.

Get Along And Get This Dress. Liana heads to Kleinfeld to find a dress for her wedding that's only four months away. Meredith wants a dress that gives her that fairy-tale feeling.

Teleshopping.

Teleshopping.

Super Cop. Mike becomes hyper-vigilant after his wallet is stolen from the squad car while taking a nap.

Joyce's Will Be Done. Molly is shocked when Joyce reveals she's leaving the house to Victoria in her will.

The Good Wife. Molly's leisure activities between novels become an issue for Mike. Tensions rise as he wants her to be the perfect homemaker.

A Computer, A Plastic Pony. Sheldon asking for a computer has unforeseen consequences for his parents, prompting Mary and the twins to move in with Meemaw.

A Sneeze, Detention. Sheldon's germophobia lands him in detention when flu season hits Medford and he takes extreme measures to remain healthy.

Potato Salad, A Broomstick. When Mary takes a job at the church, Sheldon and Missy are left home alone for the very first time.

Penny's.

Classified Material Turbulence. Stuart asks Leonard's advice for a date with Penny. Wolowitz realises there's an error in a toilet he designed for the International Space Station.

The Monopolar Expedition. The guys receive a prestigious offer to work over the summer at the North Pole, and Penny's resultant behaviour leaves Leonard unsure if he should go.

The Electric Can Opener. Discovering Leonard, Raj and Howard fudged the results of his Arctic research expedition, a disgraced Sheldon heads home to Texas.

The Jiminy Conjecture. Sheldon and Howard wager comic books over a cricket's species. Meanwhile, a less-than-perfect romantic night agonizes Leonard and Penny.

The Gothowitz Deviation. Howard takes Raj along to check out the Goth dating scene. Sheldon uses chocolate as part of a behaviour modification experiment on Penny.

The Pirate Solution. Facing a return to India, Raj needs a job desperately enough to consider working for Sheldon. Howard becomes a third wheel to Leonard and Penny.

Creepy Candy Coating Corollary. Sheldon looks forward to squaring off against a Star Trek actor in a fantasy card game tournament. Wolowitz cashes in on an old pact with Leonard.

Weekend With Birdie. Mike is excited to bring a new stray dog into the home. But Molly isn't so sure and has trouble warming up to the new family member.

The Wreck Of The Vincent Moranto. Despite promising to work together, Vince bails on finishing a do-it-yourself project with Mike.

Baby, Please Don't Go. Molly learns that a former student is not only pregnant but homeless. When she brings her home, family and friends are concerned.

Dolomite, Apple Slices. Sheldon makes a new friend who introduces him to a new field of science, while his parents disagree on how to handle Sheldon's blossoming social life.

Killer Asteroids, Oklahoma. A disappointing loss at the science fair sparks an existential crisis and sends Sheldon's life in a new direction.

Jiu-Jitsu, Bubble Wrap. When Sheldon is bullied by an unlikely character, Mary and George disagree on how to handle the situation.

The Cornhusker Vortex. Hoping to fit in with Penny's football-loving friends, Leonard gets tutored in the sport by Sheldon. Raj is furious over the loss of his patang.

The Guitarist Amplification. Leonard and Penny's first big fight sees Sheldon playing mediator due to childhood trauma that means he can't be around loud verbal conflicts.

The Vengeance Formulation. Barry Kripke pranks Sheldon during his spot on NPR, leaving him wanting vengeance. Bernadette pressures Wolowitz to define their relationship.

The Gorilla Experiment. Penny seeks Sheldon's help to better comprehend Leonard's physics work. Wolowitz sees green when Leonard invites Bernadette to watch an experiment.

The Maternal Congruence. A Christmas visit from his mother has Leonard discovering she's kept a lot of news from him that she shares with Sheldon.

The Psychic Vortex. Leonard is aghast to find out that Penny believes in psychics. Sheldon tries to assist Koothrappali in picking up a girl at a university party.

The Bozeman Reaction. A robbery of their apartment sees Leonard and Sheldon call on their friends to devise a security system.

The Einstein Approximation. Stuck on the solution to a physics problem, Sheldon tries different methods to change his thinking, including working at The Cheesecake Factory.

Brothers, Sons And Lovers. A beloved funeral director's murder exposes several shocking suspects, including his grandson, handyman, and two local celebrity brothers.

Closets Hide Skeletons. Investigators expose secrets about the brothers, including a secret affair. The revelation sparks a rageful confession - and causes another death.

Burying The Guilty. The murder trial begins, and a new investigator uncovers surprising new leads. A shocking court outcome sparks outrage.

This Cyst Persists. Half of Mary's body is a size 18 while the other is an 8. Anthony's cyst is in the area called the Triangle of Death, and Shane wants to get a lump off his back.

A Lipoma Jackpot. Belinda's lump on her neck causes her to be immobile. Nicole won't get married until she gets her arm pit lump removed. And, Nick unwisely removed a lipoma at home.

Ashley D's Story. Weighing over 700 pounds at 26-years-old, the clock is ticking on Ashley's life. Ashamed of her body, surgery offers hope, but not without setbacks.

Chad's Story. At 700 pounds, Chad undergoes gastric bypass surgery. He quickly sheds pounds, but faces a medical crisis when he does not follow the doctor's orders.

I Got Engaged Last Night! Monique has waited 20 years to get a dress that makes her look like a queen. Plus, Lauren wants a dress with wings, and Debbie has her third fitting.

I'm Gonna Be The Problem Child Here. Bride Nina rushes to find a reception dress she can bust a move in! Couple Ashley and Amber need to find a jumpsuit for Amber and a gown for Ashley.

Teleshopping.

Teleshopping.

Weekend With Birdie. Mike is excited to bring a new stray dog into the home. But Molly isn't so sure and has trouble warming up to the new family member.

The Wreck Of The Vincent Moranto. Despite promising to work together, Vince bails on finishing a do-it-yourself project with Mike.

Baby, Please Don't Go. Molly learns that a former student is not only pregnant but homeless. When she brings her home, family and friends are concerned.

Dolomite, Apple Slices. Sheldon makes a new friend who introduces him to a new field of science, while his parents disagree on how to handle Sheldon's blossoming social life.

Killer Asteroids, Oklahoma. A disappointing loss at the science fair sparks an existential crisis and sends Sheldon's life in a new direction.

Jiu-Jitsu, Bubble Wrap. When Sheldon is bullied by an unlikely character, Mary and George disagree on how to handle the situation.

The Cornhusker Vortex. Hoping to fit in with Penny's football-loving friends, Leonard gets tutored in the sport by Sheldon. Raj is furious over the loss of his patang.

The Guitarist Amplification. Leonard and Penny's first big fight sees Sheldon playing mediator due to childhood trauma that means he can't be around loud verbal conflicts.

The Vengeance Formulation. Barry Kripke pranks Sheldon during his spot on NPR, leaving him wanting vengeance. Bernadette pressures Wolowitz to define their relationship.

The Gorilla Experiment. Penny seeks Sheldon's help to better comprehend Leonard's physics work. Wolowitz sees green when Leonard invites Bernadette to watch an experiment.

The Maternal Congruence. A Christmas visit from his mother has Leonard discovering she's kept a lot of news from him that she shares with Sheldon.

The Psychic Vortex. Leonard is aghast to find out that Penny believes in psychics. Sheldon tries to assist Koothrappali in picking up a girl at a university party.

The Bozeman Reaction. A robbery of their apartment sees Leonard and Sheldon call on their friends to devise a security system.

The Einstein Approximation. Stuck on the solution to a physics problem, Sheldon tries different methods to change his thinking, including working at The Cheesecake Factory.

Baby Bump. Mike and Molly realise that Frannie doesn't have any plans in place for after the baby is born. Molly decides to help by organising a family reunion.

The Adoption Option. The adoption agency has scheduled a home visit and Mike and Molly must be on their best behaviour to make a good impression.

Curse Of The Bambino. Carl convinces Mike to go with him to see a psychic. Meanwhile, Peggy drags Molly to her church to pray for something they've been waiting for.

A Mother, A Child. When Mary bans Sheldon from reading a mature comic book, Sheldon decides it's time to assert his independence from his mother.

Gluons, Guacamole. When Sheldon is no longer academically challenged at Medford High, he audits a college class taught by a professor.

A Dog, A Squirrel. A heated argument erupts between the Coopers and their neighbours when a new dog terrorises Sheldon.

The Large Hadron Collision. When Leonard is offered a trip to Switzerland on Valentine's Day to see a particle accelerator, he must choose between taking Penny or Sheldon.

The Excelsior Acquisition. An appearance in traffic court comes at the worst possible time for Sheldon, the same day Stan Lee is appearing at the comic book store.

The Precious Fragmentation. The guys go to a garage sale and find a ring from the Lord of the Rings films, and the rare find threatens their friendship.

The Pants Alternative. Sheldon's fear of speaking in front of large groups threatens his ability to accept an award, so the gang tries to help him prepare for the big night.

The Wheaton Recurrence. Sheldon squares off at the bowling alley against nemesis Wil Wheaton. Leonard's miffed over Penny's response when he says, 'I love you.'.

The Spaghetti Catalysis. Following Leonard and Penny's break up, Sheldon tries to hide from Leonard and the gang that he had a friendly spaghetti dinner at Penny's.

The Plimpton Stimulation. Sheldon hosts a visiting female physicist, but her intelligence seems matched by her libido.

The Staircase Implementation. A squabble over the thermostat setting leads to Leonard going over to Penny's and recounting the story of how he met and moved in with Sheldon.

Dara Ó Briain hosts more laughter filled game play with guests Rhys James, Angela Barnes, Sarah Keyworth, Glenn Moore, Milton Jones and Ahir Shah.

Soon-to-be-married Peter's lack of male friends prompts him to undertake a quest to find true 'bromance' so he can have a best man at the wedding.

The Curious Case Of The Pooting Cyst. Diane has thousands of tumours all over her body that have ruined her life. Plus, Will is worried his shoulder lump will be ripped open at work.

An American Tail. The large bump at the base of Taylor's spine is more dangerous than she realizes. John has an embarrassing hip lump, and Noelle wants her stretched ears repaired.

Brittani's Story. Brittani married a man who loves large women but at 600 lbs she can barely contribute to their marriage. After surgery, she must forge a new life.

June's Story. 600-pound June copes with the tragic death of her son by eating. After gastric bypass surgery, she must confront the emotional issues driving her food compulsion.

Back, Biceps, Booty. Victoria wants to show off her back, curves, and biceps, but Grandma wants her to cover up! Plus, Dominique has a little panic in the stockroom.

Give The Man What He Wants. Amanda's back at Kleinfeld to find a second dress after her fiancé hated her first pick. Plus, Kindra and Jamel forget a key element of their wedding!

Teleshopping.

Teleshopping.

Baby Bump. Mike and Molly realise that Frannie doesn't have any plans in place for after the baby is born. Molly decides to help by organising a family reunion.

The Adoption Option. The adoption agency has scheduled a home visit and Mike and Molly must be on their best behaviour to make a good impression.

Curse Of The Bambino. Carl convinces Mike to go with him to see a psychic. Meanwhile, Peggy drags Molly to her church to pray for something they've been waiting for.

A Mother, A Child. When Mary bans Sheldon from reading a mature comic book, Sheldon decides it's time to assert his independence from his mother.

Gluons, Guacamole. When Sheldon is no longer academically challenged at Medford High, he audits a college class taught by a professor.

A Dog, A Squirrel. A heated argument erupts between the Coopers and their neighbours when a new dog terrorises Sheldon.

The Large Hadron Collision. When Leonard is offered a trip to Switzerland on Valentine's Day to see a particle accelerator, he must choose between taking Penny or Sheldon.

The Excelsior Acquisition. An appearance in traffic court comes at the worst possible time for Sheldon, the same day Stan Lee is appearing at the comic book store.

The Precious Fragmentation. The guys go to a garage sale and find a ring from the Lord of the Rings films, and the rare find threatens their friendship.

The Pants Alternative. Sheldon's fear of speaking in front of large groups threatens his ability to accept an award, so the gang tries to help him prepare for the big night.

The Wheaton Recurrence. Sheldon squares off at the bowling alley against nemesis Wil Wheaton. Leonard's miffed over Penny's response when he says, 'I love you.'.

The Spaghetti Catalysis. Following Leonard and Penny's break up, Sheldon tries to hide from Leonard and the gang that he had a friendly spaghetti dinner at Penny's.

The Plimpton Stimulation. Sheldon hosts a visiting female physicist, but her intelligence seems matched by her libido.

The Staircase Implementation. A squabble over the thermostat setting leads to Leonard going over to Penny's and recounting the story of how he met and moved in with Sheldon.

I See Love. Mike and Molly gather with friends and family for a momentous occasion. They celebrate and reminisce about everything that brought them together.

Pilot. Teacher Molly hears cop Mike's share at an Overeaters Anonymous meeting. Instantly smitten, she invites him to come speak to her fourth-grade class.

First Date. When Molly gets a cold before her first date with Mike, she takes some cold medication to help her feel better - with disastrous results.

Summer Sausage, Pocket Poncho. While Sheldon is obsesses over Meemaw's budding relationship with his mentor, Dr. Sturgis, George and Mary attempt to bond with their other kids.

Ice Cream, Gentlemen Callers. When Meemaw is pursued by two gentlemen callers, Sheldon interferes, forcing her to set some ground rules.

A High-Pitched Buzz. Sheldon dismantles the refrigerator to stop an annoying hum and then must get a paper route to pay for the repairs.

The Lunar Excitation. Howard and Raj set Sheldon up on an Internet dating site. Penny discovers that she can't go back to dating dumb jocks after dating Leonard.

The Robotic Manipulation. Howard uses a robotic arm for his own pleasure. Sheldon goes on a date with Amy Farrah Fowler, and Penny finds herself accompanying them.

Cruciferous Veg Amplification. Sheldon calculates that he'll be dead before technology exists to download his consciousness into a robot, so he goes on a healthy-living binge.

The Zazzy Substitution. Sheldon breaks up with Amy Farrah Fowler, and the guys worry when he starts replacing her with cats.

The Hot Troll Deviation. Wolowitz is embarrassed when a secret of his is revealed, and Sheldon and Raj battle at work.

The Desperation Emanation. Sheldon meets Amy's mum and comes to the realisation he no longer wants to see Amy, and Leonard realises everyone is in a relationship except for him.

The Irish Pub Formulation. When Raj's sister has a one-day layover, he forbids the others from hooking up with her, unaware she and Leonard already did long ago.

The Apology Insufficiency. The rest of the gang is interviewed by the FBI for Wolowitz's security clearance, with Sheldon accidentally letting slip some damaging information.

Lessons In Pimple Popping. Dr. Lee meets Dot, who has a large lump growing on her inner thigh. Plus, a new doctor helps 68-year-old Tim with his severe rhinophyma.

A Juicy Secret. Katrina suffers from oozing, smelly boils that have appeared all over her body. Plus, a patient with Neurofibromatosis seeks help from Dr. Lee.

Lookin' For Love In Lumpy Places. Gabriel has a huge growth on his clavicle but is terrified of surgery. Karen has dealt with painful, scaly feet for 22 years with no diagnosis.

The Last Unicorn. Louis is covered in scaly skin that makes him feel like an alligator. Jennifer can't focus on her career due to a large unicorn-like lump on her forehead.

Every Rosacea Has Its Thorn. Patrick's nose is covered by huge bumps and he can barely breathe. Matt has suffered from neurofibromatosis his entire life and is in incredible pain.

Gideon's Story. At 650 pounds and Desperate for change, Gideon uproots his family to restart his life with weight-loss surgery and hopes for a future of happily-ever-after.

Dottie's Story. Dottie loves being a mom but, at over 600lbs, she's on the verge of leaving her 2 young children motherless. Can she take drastic action and turn her life around?

The 'Just in Case' Dress. Red doesn't want to settle for the dress she already bought. Randy gets a blast from the past, and one bride gets a taste of her own medicine!

I Just Need To Find A Husband. Personal trainer Jessica needs a gown that shows off her muscular back, and Marie-Therese is shopping for a wedding dress despite still being single!

Teleshopping.

Teleshopping.

I See Love. Mike and Molly gather with friends and family for a momentous occasion. They celebrate and reminisce about everything that brought them together.

Pilot. Teacher Molly hears cop Mike's share at an Overeaters Anonymous meeting. Instantly smitten, she invites him to come speak to her fourth-grade class.

First Date. When Molly gets a cold before her first date with Mike, she takes some cold medication to help her feel better - with disastrous results.

Summer Sausage, Pocket Poncho. While Sheldon is obsesses over Meemaw's budding relationship with his mentor, Dr. Sturgis, George and Mary attempt to bond with their other kids.

Ice Cream, Gentlemen Callers. When Meemaw is pursued by two gentlemen callers, Sheldon interferes, forcing her to set some ground rules.

A High-Pitched Buzz. Sheldon dismantles the refrigerator to stop an annoying hum and then must get a paper route to pay for the repairs.

The Lunar Excitation. Howard and Raj set Sheldon up on an Internet dating site. Penny discovers that she can't go back to dating dumb jocks after dating Leonard.

The Robotic Manipulation. Howard uses a robotic arm for his own pleasure. Sheldon goes on a date with Amy Farrah Fowler, and Penny finds herself accompanying them.

Cruciferous Veg Amplification. Sheldon calculates that he'll be dead before technology exists to download his consciousness into a robot, so he goes on a healthy-living binge.

The Zazzy Substitution. Sheldon breaks up with Amy Farrah Fowler, and the guys worry when he starts replacing her with cats.

The Hot Troll Deviation. Wolowitz is embarrassed when a secret of his is revealed, and Sheldon and Raj battle at work.

The Desperation Emanation. Sheldon meets Amy's mum and comes to the realisation he no longer wants to see Amy, and Leonard realises everyone is in a relationship except for him.

The Irish Pub Formulation. When Raj's sister has a one-day layover, he forbids the others from hooking up with her, unaware she and Leonard already did long ago.

The Apology Insufficiency. The rest of the gang is interviewed by the FBI for Wolowitz's security clearance, with Sheldon accidentally letting slip some damaging information.

First Kiss. Mike's ego is put on the line during a bowling date with Molly.

Mike's Not Ready. Molly thinks Mike's no longer interested when he declines her invitation to come inside after their third date - but their signals are just crossed.

Carl Is Jealous. Mike invites Carl on a double date when Carl becomes jealous of the time Mike is spending with Molly.

A Rival Prodigy. When Dr. Sturgis bonds with Paige, another 10-year-old genius, Sheldon gets jealous. Meanwhile, Mary invites Paige's family over for a play date.

A Crisis Of Faith. When Mary's faith is shaken by a tragedy in the community, Sheldon becomes an unlikely ally.

A Financial Secret. When George Sr. asks Sheldon to keep a secret from Mary, the stress of not being honest drives Sheldon to hide out at Tam's for his first sleepover.

The 21-Second Excitation. The guys camp out to see a print of Raiders of the Lost Ark with 21 extra seconds and are outraged to see Wil Wheaton and his friends skip the line.

The Boyfriend Complexity. Penny asks Leonard to lie to her visiting father, while Howard, Raj and Bernadette spend all night looking through a telescope.

The Alien Parasite Hypothesis. Amy crushes on one of Penny's dim ex-boyfriends, Zack. Raj and Wolowitz argue over who'd be the better superhero.

Justice League Recombination. The guys get Zack and Penny to join their Justice League costume for a New Year's Eve bash at the comic book store.

The Bus Pants Utilization. Their friendship becomes strained when Sheldon tries to take over Leonard's creation of a smartphone application that solves differential equations.

The Love Car Displacement. Howard is jealous when Bernadette runs into her old boyfriend at a science event they're attending.

The Thespian Catalyst. Sheldon wants acting lessons from Penny, hoping they will make him a better teacher.

The Benefactor Factor. After meeting at a fundraising gala, an aged but wealthy Caltech donor makes Leonard ponder if he's willing to have sex with her to secure a donation.

The Art Of The Situationship. Vanja opens her heart to someone new. Colt and Cortney try to keep their spark alive. Sophie feels betrayed by Liz, and Liz goes on a date with Villa.

Welcome To Speed Dating. Meri's speed dating event starts out awkward until she meets an encouraging suitor named Ron. Janelle and Meri discuss whether to sell Coyote Pass.

Lessons In Pimple Popping. Dr. Lee meets Dot, who has a large lump growing on her inner thigh. Plus, a new doctor helps 68-year-old Tim with his severe rhinophyma.

A Juicy Secret. Katrina suffers from oozing, smelly boils that have appeared all over her body. Plus, a patient with Neurofibromatosis seeks help from Dr. Lee.

Nose No Bounds. April is covered in bumps that have disfigured her arms. And, Genner has flown all the way from the Philippines to have Dr. Lee help with his bumpy nose.

Randy's Story. At 650lbs, Randy's food addiction led to the loss of his marriage and visits with his daughter. To regain control of his life, he endures a rigorous pre-surgery diet.

Teretha's Story. At over 700lbs, Teretha's life is confined to a bed. Her family fears losing her and hopes a gastric bypass will provide the solution she needs to save her life.

Nobody Suspects A Thing. Lori has kept a secret from her entourage and now it's time for the big reveal! Merchandise Director Dorothy tries on a wedding dress for the first time.

Tens Across The Board. Non-binary bride Kevin's vision puts Randy and Peter to the test. New consultant Olivia struggles to hold her own against the world's bossiest best friend.

Teleshopping.

Teleshopping.

First Kiss. Mike's ego is put on the line during a bowling date with Molly.

Mike's Not Ready. Molly thinks Mike's no longer interested when he declines her invitation to come inside after their third date - but their signals are just crossed.

Carl Is Jealous. Mike invites Carl on a double date when Carl becomes jealous of the time Mike is spending with Molly.

A Rival Prodigy. When Dr. Sturgis bonds with Paige, another 10-year-old genius, Sheldon gets jealous. Meanwhile, Mary invites Paige's family over for a play date.

A Crisis Of Faith. When Mary's faith is shaken by a tragedy in the community, Sheldon becomes an unlikely ally.

A Financial Secret. When George Sr. asks Sheldon to keep a secret from Mary, the stress of not being honest drives Sheldon to hide out at Tam's for his first sleepover.

The 21-Second Excitation. The guys camp out to see a print of Raiders of the Lost Ark with 21 extra seconds and are outraged to see Wil Wheaton and his friends skip the line.

The Boyfriend Complexity. Penny asks Leonard to lie to her visiting father, while Howard, Raj and Bernadette spend all night looking through a telescope.

The Alien Parasite Hypothesis. Amy crushes on one of Penny's dim ex-boyfriends, Zack. Raj and Wolowitz argue over who'd be the better superhero.

Justice League Recombination. The guys get Zack and Penny to join their Justice League costume for a New Year's Eve bash at the comic book store.

The Bus Pants Utilization. Their friendship becomes strained when Sheldon tries to take over Leonard's creation of a smartphone application that solves differential equations.

The Love Car Displacement. Howard is jealous when Bernadette runs into her old boyfriend at a science event they're attending.

The Thespian Catalyst. Sheldon wants acting lessons from Penny, hoping they will make him a better teacher.

The Benefactor Factor. After meeting at a fundraising gala, an aged but wealthy Caltech donor makes Leonard ponder if he's willing to have sex with her to secure a donation.

Mike's Apartment. When Mike invites Molly over to his apartment, his plans for romance are interrupted by an untimely call from his mum, Peggy.

After The Lovin'. After spending the weekend with Molly, Mike comes on too strong. Then, taking Carl's advice to play it cool, he tries not to go overboard.

Mike Snores. Annoyed when she spends all her time at Mike's apartment, Molly insists he spend a night at her place - and a taste of life with her mum and sister.

A Research Study. Dr. Sturgis recommends Sheldon and Missy for a university research study on twins, and Mary is unhappy when the test results go to Sheldon's head.

Seven Deadly Sins. Mary clashes with Sheldon's drama teacher Mr. Lundy over plans for a Halloween haunted house fundraiser for the church.

Carbon Dating, Stuffed Raccoon. Sheldon gets into trouble with fellow child genius Paige at the Science Museum, while George Sr. is forced to play therapist to Paige's parents.

The Cohabitation Formulation. Howard contemplates a serious decision in his relationship with Bernadette, and Leonard and Raj's sister start seeing each other again.

The Toast Derivation. Sheldon is in a crisis when he realises he's not the epicentre of the group, so he decides to find new friends.

The Prestidigitation Approximation. Leonard has a tough choice to make when Priya asks him to stop spending time with Penny, and Howard keeps pestering Sheldon with a magic trick.

The Zarnecki Incursion. The guys become sleuths to find out who hacked Sheldon's online-game account.

The Herb Garden Germination. Sheldon and Amy decide to start rumours about themselves as a social test. Howard takes his relationship with Bernadette to an even higher level.

The Agreement Dissection. Priya uses her legal expertise to rip apart Sheldon's roommate agreement, and the women take the flustered Sheldon out dancing.

The Wildebeest Implementation. Raj makes an attempt to cure his phobia of talking to women, and Penny spies on Leonard and Priya with the help of Bernadette.

The Engagement Reaction. Mrs. Wolowitz ends up in the hospital after Howard tells her he's marrying Bernadette. While there, Leonard stresses over Penny and Priya.

Initial Descent. Emma and Ziad take their relationship to the next level. Rick confesses a devastating secret to Trish. Laura learns the truth behind Birkan's debt.

Goddess Of The Music Store. Georgie helps Connor impress his new crush, while Mandy, Audrey and Jim struggle to butt out of Connor's love life.

Baby Fight! Georgie and Mandy worry they're not on the same page when they disagree about having another kid, and Mary, Jim and Audrey struggle to stay out of it.

Tumor Takeover. Matt has a skin condition that causes tumours to grow all over his body. Plus, Jennifer has a unicorn bump on her forehead.

Sisters Lumpity Lump Lump. Amber has hundreds of tumours on her face. Cheri and Janice suffer from possibly matching lumps. Tatiana has an embarrassing bump on her butt cheek.

Milla's Story. At 700lbs, Milla is dependent on her husband. Terrified each day will be her last can Milla stop a lifetime of unhealthy eating to qualify for gastric surgery?

Cynthia's Story. Single mother-of five-Cynthia works as a special needs teacher, but that is becoming impossible at 610 pounds - now she risks losing her family and her life.

She Said Maybe To The Dress. Radio host Kenzie wants a dress that is as loud and sparkly as her personality. Plus, Jenny Tolman gets married on a beautiful, snowy mountaintop.

It's Gotta Be . Substantial. Vanisha wants a sexy dress, but her opinionated sisters become an obstacle. Paris is a former bridal consultant who needs an over-the-top ball gown.

Teleshopping.

Teleshopping.

Dolomite, Apple Slices. Sheldon makes a new friend who introduces him to a new field of science, while his parents disagree on how to handle Sheldon's blossoming social life.

Killer Asteroids, Oklahoma. A disappointing loss at the science fair sparks an existential crisis and sends Sheldon's life in a new direction.

Jiu-Jitsu, Bubble Wrap. When Sheldon is bullied by an unlikely character, Mary and George disagree on how to handle the situation.

A Mother, A Child. When Mary bans Sheldon from reading a mature comic book, Sheldon decides it's time to assert his independence from his mother.

Gluons, Guacamole. When Sheldon is no longer academically challenged at Medford High, he audits a college class taught by a professor.

A Dog, A Squirrel. A heated argument erupts between the Coopers and their neighbours when a new dog terrorises Sheldon.

Goddess Of The Music Store. Georgie helps Connor impress his new crush, while Mandy, Audrey and Jim struggle to butt out of Connor's love life.

Baby Fight! Georgie and Mandy worry they're not on the same page when they disagree about having another kid, and Mary, Jim and Audrey struggle to stay out of it.

The Cornhusker Vortex. Hoping to fit in with Penny's football-loving friends, Leonard gets tutored in the sport by Sheldon. Raj is furious over the loss of his patang.

The Guitarist Amplification. Leonard and Penny's first big fight sees Sheldon playing mediator due to childhood trauma that means he can't be around loud verbal conflicts.

The Vengeance Formulation. Barry Kripke pranks Sheldon during his spot on NPR, leaving him wanting vengeance. Bernadette pressures Wolowitz to define their relationship.

The Gorilla Experiment. Penny seeks Sheldon's help to better comprehend Leonard's physics work. Wolowitz sees green when Leonard invites Bernadette to watch an experiment.

The Maternal Congruence. A Christmas visit from his mother has Leonard discovering she's kept a lot of news from him that she shares with Sheldon.

The Psychic Vortex. Leonard is aghast to find out that Penny believes in psychics. Sheldon tries to assist Koothrappali in picking up a girl at a university party.

The Bozeman Reaction. A robbery of their apartment sees Leonard and Sheldon call on their friends to devise a security system.

The Einstein Approximation. Stuck on the solution to a physics problem, Sheldon tries different methods to change his thinking, including working at The Cheesecake Factory.

The Large Hadron Collision. When Leonard is offered a trip to Switzerland on Valentine's Day to see a particle accelerator, he must choose between taking Penny or Sheldon.

The Excelsior Acquisition. An appearance in traffic court comes at the worst possible time for Sheldon, the same day Stan Lee is appearing at the comic book store.

The Precious Fragmentation. The guys go to a garage sale and find a ring from the Lord of the Rings films, and the rare find threatens their friendship.

The Pants Alternative. Sheldon's fear of speaking in front of large groups threatens his ability to accept an award, so the gang tries to help him prepare for the big night.

The Wheaton Recurrence. Sheldon squares off at the bowling alley against nemesis Wil Wheaton. Leonard's miffed over Penny's response when he says, 'I love you.'.

The Spaghetti Catalysis. Following Leonard and Penny's break up, Sheldon tries to hide from Leonard and the gang that he had a friendly spaghetti dinner at Penny's.

The Plimpton Stimulation. Sheldon hosts a visiting female physicist, but her intelligence seems matched by her libido.

The Staircase Implementation. A squabble over the thermostat setting leads to Leonard going over to Penny's and recounting the story of how he met and moved in with Sheldon.

The Lunar Excitation. Howard and Raj set Sheldon up on an Internet dating site. Penny discovers that she can't go back to dating dumb jocks after dating Leonard.

The Robotic Manipulation. Howard uses a robotic arm for his own pleasure. Sheldon goes on a date with Amy Farrah Fowler, and Penny finds herself accompanying them.

Cruciferous Veg Amplification. Sheldon calculates that he'll be dead before technology exists to download his consciousness into a robot, so he goes on a healthy-living binge.

The Zazzy Substitution. Sheldon breaks up with Amy Farrah Fowler, and the guys worry when he starts replacing her with cats.

Dara Ó Briain hosts more laughter filled game play with guests Rhys James, Angela Barnes, Sarah Keyworth, Glenn Moore, Milton Jones and Ahir Shah.