On the night before Chin Ho's wedding, the team's investigation into a man left to die in an abandoned bunker intersects with Capt. Fryer's case.

When a teenager is murdered, the team must determine why she was targeted and if the person responsible was a hired professional.

The team members go under cover on a cruise ship in order to locate and disable stolen rockets; as Valentine's Day approaches, Ralph develops a crush.

The members of the team travel to Mexico when the daughter of a tech billionaire is abducted; Walter participates in an interview that leads to hurt feelings.

The team must facilitate peace discussions when a conflict in Eastern Europe threatens to escalate into World War III.

As the members of team Scorpion try to save lost hikers, their helicopter crashes, igniting a large wildfire and injuring the pilot.

Pride's teams uncover a sinister plot during the New Orleans Tricentennial Fleet Week celebration.

While Pride fights for his life in the ICU, the team scours the city for the hit woman who attempted to assassinate him.

The team searches for a former Irish Republican Army bomb maker who was smuggled into the city; they are joined by agent Hannah Khoury, Pride's replacement during his medical leave; Pride considers a new position within the agency.

The team investigates the murder of a Navy intelligence officer killed during a conference for foreign diplomats; Pride has some trouble adjusting to his new position at the agency.

An investigation into the murder of a petty officer reveals a conspiracy in a tight-knit local fishing community; LaSalle awaits the final results of the tax fraud investigation into his family's company.

Pride's father, Cassius Pride, is wrapped up in an NCIS case involving a notorious unsolved casino heist; Pride meets a family member he never knew existed.

After Pride's assistant escapes from a kidnapper, the team uncovers evidence of a suspect who is harvesting organs from multiple victims; Pride turns to a friend for guidance as he struggles with the ramifications of his recent brush with death.

Following a deadly car explosion in the French Quarter, the team interrogates a professor and former member of a student protest organization; Tammy discovers a secret about Hannah's personal life.

The team places Mateo Diaz, a high school gang member turned informant, in protective custody while they investigate the murder of his junior reserve officers' training corps instructor; Pride needs his brother's help to gain Mateo's trust.

The team investigates the murder of a Navy contractor who secretly lived two lives for decades.

Pride is given a series of tasks to complete by unknown assailants who are holding Wade and his father hostage.

Pride and the team hope to take down a secret and lethal group of former intelligence agents and avenge the death of someone close to them.

While undercover, Gregorio joins a social club for military wives after one of the members is contacted by an ex-boyfriend who is on the FBI's most wanted list.

NCIS investigates the disappearance of a Navy entomologist after a deadly shooting at a research lab; the team finds that a rare and deadly virus was stolen.

Pride and the team reunite with conspiracy journalist Oliver Crane after the source for his latest story is murdered; Hannah's former partner, Liam Somers, surprises her and shares a shocking revelation about an old case.

The team investigates multiple murders tied to a construction company that creates an experimental chemical that strengthens sea walls; evidence from Hannah's previous mission in Oman is used against her.

After an elusive terrorist with a personal vendetta against Hannah resurfaces, she and her family are placed in protective custody while the team searches for the suspect.

After a reshuffling of assignments, Pride returns to the New Orleans office during the investigation of a missing petty officer.

The NCIS team investigates the murder of Patton's friend, a former Navy SEAL gunned down in a drive-by shooting while Patton watched.

A Navy lieutenant from a well-connected and affluent family has a fatal fall down a flight of stairs at a charity gala; the team investigates whether his death was an accident or foul play.

The team protects a witness who is on her way to testify against a dangerous drug cartel -- while the cartel is in hot pursuit.

When Walter finally learns Cabe's secret about the Baghdad mission, the future of the team is threatened; Ralph puts his life in jeopardy to help the team.

When Walter's car ends up at the edge of a cliff, the fractured team must come together for their most important mission yet.

When a nuclear powered Russian satellite is knocked out of orbit, the new Director of Homeland Security reunites the team; Paige and Walter confront their feelings.

Horatio and the bomb squad must defuse a land mine before it detonates; Delko is sued for his role in a domestic dispute.

Hijackers take a truck full of confiscated weapons, and Horatio links the crime to Clavo Cruz; a confiscated missile launched into the courthouse helps Clavo escape; a member of Horatio's team is fatally shot.

A member of the team fights for his life after being shot in the head; the hunt for Clavo Cruz continues.

The team investigates when the parents of a baby sitter in an upscale neighborhood are murdered; key evidence leads Horatio to expose a doctor who has dirty secrets.

Evidence suggests foul play after a member of a hunting group is mauled by a bear.

As a dangerous hurricane hits Oahu, Five-0 is tasked with protecting El Diablo, a captured serial killer who is being hunted by an assassin; Tani's civilian safety check during the storm turns deadly; Rachel and Charlie evacuate to Danny's house.

When the top salesperson for a beauty company pyramid scheme is murdered, the team sifts through a long list of possible suspects who would want her dead; Adam befriends a homeless man.

Junior is torn between his duties and his feelings for his former girlfriend when her new man is one of the culprits in a bank heist-turned-homicide.

Tani and Junior go under cover at a gym to track down a deadly batch of steroids; Danny and McGarrett work as bodyguards for Danny's high maintenance ex-mother-in-law, a famous romance novelist with whom he has never gotten along.

The team investigates the murder of a window washer and finds that the victim is actually a renowned street artist; Grover and Adam look into the murder of a gambler; Junior helps his father when they are reminded of his sister's death.

When the team must locate a girl who purchased a gun from a junkie, it discovers that the firearm, over the course of decades, has affected all of the teammates' lives.

A murdered man's body may hold the key to a 20-year-old case involving a kidnapped girl whose father never stopped looking for her.

Adam investigates the murder of an undercover FBI agent who was about to wed the daughter of a Yakuza leader; Noelani is held hostage and forced, along with her mentor Dr. Chu, to operate at gunpoint on a criminal.

McGarrett helps his sister spy on her shady neighbors; a ride-share driver and his passenger are murdered; the team teases the youngest members when Junior escorts Tani to a wedding.

Fugitive hacker Aaron Wright resurfaces to ask for help when his co-workers at the NSA are murdered; Junior speaks at the parole hearing of the drunken driver who killed his sister.

Five-0 continues to hunt down escaped criminal Aaron Wright before he can sell cyber-weapons to the highest bidder; the lives of McGarrett and the team members are put in danger when a visitor comes to headquarters to make amends.

A new ally helps McGarrett and the team when mob bosses on the island are targeted by an assassin; the team says goodbye to one of its own.

Tani and Junior must plot an escape for themselves and several civilians after they become trapped inside a deadly tunnel collapse; Eddie the dog sniffs out a bomb that has been planted in McGarrett's home.

A plane that mysteriously crashed into the Pacific in the '80s is found, but with a recently murdered scuba diver inside; McGarrett and Quinn zero in on who planted the bomb in his garage; McGarrett formally asks Quinn to join the team.

Five-0 enlists imprisoned hacker Aaron Wright to help when a young girl is reported kidnapped.

Mac and the team delve into the world of Italian car culture to track down a crime boss; Mac must lean on Desi when he discovers that he's losing the ability to control his hands; Mac and Desi move in together.

Mac and Desi travel with Bozer to his childhood home when his aunt dies in a tragic accident; they soon discover she may have been murdered for trying to expose the city's contaminated water supply.

Mac and Riley go missing and wake up 24 hours later in a cornfield with no memory of how they got there; they must unravel the mystery and find out how to get rid of the nanotrackers in their bodies, no matter the cost.

Special agents for the Department of External Services, Angus "Mac" MacGyver and Jack Dalton, work to recover a missing bioweapon.

MacGyver and the team attempt to rescue Jack's former CIA partner who went missing in Venezuela after finding evidence to take down an international arms dealer.

In Malaysia, MacGyver and the team extract a terrorist group's money man who has intel on an impending attack, but when the man is shot, MacGyver must keep him alive in order to learn the terrorists' plans.

Mac and Jack work with a Russian bomb programmer and his alienated handler to defuse a Soviet-era warhead in Moscow; when the antiquated computer breaks down, Mac must find a way to fix it.

MacGyver must fix a sabotaged train to protect a woman who has proof that her boss is selling weapons to enemies of the U.S.

When a series of backyard pool homicides are reported in California, the BAU team searches for an UnSub which has a puzzling past.

The BAU team's investigation into the home invasion and attempted homicide of a police chief's wife uncovers a world of secrets in a small town in Virginia.

The BAU is called to New York when several casualties of a brutal nature are reported in Central Park.

The BAU is called to investigate a series of homicides in which cryptic messages are found inside the mouths of the victims.

The BAU is called when the New Orleans Police Department discovers a mass grave inside a vandalized above-ground crypt in a local cemetery.

The FBI's assistant director of national security joins the BAU as it investigates the quadruple homicide of a group of roommates in St. Louis.

The BAU meets in secret to investigate a subject who appears to be kidnapping and photographing young women.

The BAU is called to Oklahoma to investigate a murderous clown who is terrorizing a town.

The BAU travels to Chicago to investigate a case where red roses are left on victims; Rossi gets an unexpected visit from his ex-wife.

The BAU takes charge of a hostage situation at a law firm where Matt Simmons' wife works.

The BAU is called upon when bioterrorism is suspected in a series of mysterious deaths; Garcia visits her stepbrother to take care of a difficult family issue.

The BAU is called to Taos, N.M., when someone targets victims' temporal lobes.

The team questions the credibility of a former FBI agent's bizarre account.

When Reid and Garcia are abducted by a mass murderer, it's up to the rest of the team to find them; the BAU looks to their past to solve why the two heroes have been targeted.

The team tracks a serial killer when remains of numerous victims are found in the walls of an elderly couple's home; the hunt becomes urgent after the BAU learns the killer's specific ritual of when to strike; Rossi reconnects with his ex-wife.

Packages with gruesome contents are delivered to six people in the Washington, D.C.. area; Simmons and Kristy struggle to connect with their son, David, who is suspended from school for aggressive behavior.

When a wealthy real-estate developer is killed, the team suspects his wife, then realizes that she is a triplet with identical sisters.

Horatio suspects that owners of an American Indian casino are involved in a murder victim's scalping.

The team investigates the death of a movie star who was on the verge of exposing damaging secrets.

A nasty divorce gets worse when the husband's mistress turns up dead, and the body count continues to rise as the complicated relationship unravels.

Horatio must fire a member of his team when the problems of that person taint the current investigation.

After a suspected carjacker is killed, the team learns that he may have been involved in drug smuggling off the shore of Miami.

When a serial killer is caught and identified as having an extra Y chromosome, the team mistakenly thinks that it has closed the case.

A hostage situation turns into murder; Horatio thinks one of the suspects may be his son.

After the Internet turns a high-school student into an international sex symbol, information leaked about Horatio puts his life in danger.

Horatio goes in search of his son, who is missing after a deadly prison break.

While probing the mysterious death of a college student in a car fire, the CSI team finds evidence indicating that a former colleague (Rory Cochrane) may still be alive.

A retired sports legend is stabbed to death, but Alexx is unable to take the body for an autopsy.

Brennan makes a shocking discovery while trying to identify a Jane Doe; Brennan tries to come to grips with her parents' past.

Brennan and Booth investigate the site of a train wreck that includes the bodies of a senator and a high-profile businessman.

The remains of a woman and fetus are found in the Delaware Bay; Brennan and Booth call for a manhunt for the victim's husband; Booth has issues with his ex-wife's boyfriend.

Wrapped in a shroud, the body of a young man lies beside an overturned garbage truck; Brennan's past as a foster child influences her judgment; Brennan and Cam butt heads over their work styles; Cam makes threats.

Brennan and her team match wits with a serial killer to save a girl's life.

Booth and Brennan probe what appears to be a case of jealousy and insurance money when a man is found dead at a construction site, but new clues send them in a different direction.

Brennan and Booth investigate an explosion in a Miami hotel where a young woman had burned to death.

Brennan and Booth investigate a young beauty queen's remains that are discovered at a water filtration plant; Hodgins asks Angela out on a date, which she accepts.

The skeletal remains of a federal prosecutor, who disappeared five years earlier, are discovered in the desert outside Las Vegas; an anonymous lead takes Booth and Brennan to the world of gambling and underground ultimate fighting.

Booth and Brennan search for a killer who buries his victims alive and leaves them to die if ransom demands are not met.

Brennan and Booth investigate when a headless corpse appears in the woods along with a frightening videotape of events on the night of the murder.

Brennan and Booth investigate the case of a mutilated body found on the roof of a federal building; Brennan hears from her long-lost father.

Toby and Michelle investigate the death of a pharmaceutical executive who released a drug with killer results.

Toby and Michelle must recapture an escaped criminal mastermind before he can seek revenge.

Toby starts doubting his abilities after Michelle questions his insights during their investigation into a wealthy philanthropist's murder.

Toby and the IIB must find the source of a deadly virus before it kills more people.

A series of strangulations leads the team to look for a killer who keeps mementos of his victims; Rossi's favorite bar is in danger of closing.

The team searches for missing teens who are suspects in a series of mass murders in Chicago.

When skeletons are discovered in the backyard of a home in Virginia, family secrets and past racial divisions are brought to light.

When a young boy disappears from his home in St. Louis, the team examines a similar cold case for clues.

Blake must work with her retired police captain father and her detective brother to solve a series of murders in Kansas City.

A murder investigation results in Garcia delving into her hacker past -- and reconnecting with a former flame.

As the team searches for a vigilante killer in Cleveland, Rossi's former Marine sergeant goes missing in Los Angeles; J.J.'s secret catches up with her.

The BAU learns of JJ's kidnapping, they discover that Cruz has also been abducted and delve into the files of a classified assignment; the team uncovers details of INTEGRITY, the covert database born out of the operation to find Osama bin Laden.

The team searches for a pair of suspects responsible for several murders near Pittsburgh; Morgan and Garcia make Valentine's Day plans with their significant others.

The BAU makes startling discoveries as they search for a 4-year-old girl who went missing while staying with a relative.

The BAU must determine the true cause and motive when several drowned people are discovered in the Las Vegas desert.

Three bodies bitten by humans and animals are found in a shallow grave; Garcia and Reid hide their preparation for a company fitness test from Morgan.

Morgan's visit with a survivor of unusual stabbings in upstate New York leads to more questions about the case.

The discovery of two murder victims in West Virginia uncovers a long-simmering feud between two families.

The team searches for a commonality when a series of target abductions take place; Savannah is frustrated with Morgan's traveling.

When people are killed by arsenic poisoning and handwritten death threats are found, the team pursues a suspect fascinated by Greek mythology; Hotch is worried about participating in a Career Day at Jack's school.

When prostitutes are murdered in Texas, their deaths seem to have religious overtones; members of the team are put at risk throughout the course of the investigation.

The investigation in Texas reveals a deep web of corruption; Garcia must save a friend.

The team investigates a series of murders with unidentifiable victims in Bakersfield, Calif.; agent Kate Callahan joins the team.

The team members search for a vengeful suspect who was once abused; Garcia travels to Texas to confront the person she shot.

MacGyver must diffuse a bomb planted near the United Nations by his old adversary, the Ghost, then track the criminal down.

When MacGyver goes under cover to break a notorious drug kingpin out of a maximum security prison, he must track the fugitive to the cartel's location to dismantle it after they escape.

When MacGyver faces an international assassin hired to kill him, he must defend both himself and Bozer with only a corkscrew and paper towel rolls; Bozer learns MacGyver's true identity.

In Latvia, MacGyver and his team must defend themselves and a group of U.S. embassy workers from extremists trying to retrieve their leader; Bozer faces an important decision.

Mac and the team search for a kidnapped prodigy from Mac's former middle school; with only pliers and some wire, Mac attempts to rescue the young genius.

MacGyver and Jack must find Riley after she disappears and hacks into the NSA; Bozer embarks on his first mission; Jack reveals his history with Riley's mother.

MacGyver hunts a U.S. government mole who is leaking classified information to the organization trying to take down the Phoenix Foundation; Sarah comes back to help with the mission; Mac can't tell which side Nikki is on.

While returning from capturing a war criminal, Mac and Jack's helicopter crashes, allowing the prisoner to escape.

The team members investigate when remains are found in a stairwell at a convention they are attending; Brennan bumps into her publishing rival, Tess Brown; Wendell has news about his diagnosis.

The investigation into the death of a maid whose remains were found on the side of the road turns out to be a bigger case than originally thought; tensions rise between Cam and Brennan.

The team investigates a billion dollar hedge fund company after severely damaged human remains are found under a merry-go-round.

The team investigates when a crossword puzzle master is found in an urban fracking site; Daisy seeks comfort from her doula.

The team investigates when a psychology professor known for his controversial social experiments is found dead; Brennan works with Aubrey.

In the 1950s Hollywood, Brennan is an LAPD detective faced with sexism on the force, and Booth is a notorious jewel thief -- who is framed for murder.

Angela's psychic friend Avalon helps the team investigate when a psychic is found dead in the trunk of a tree; Booth and Brennan consider the pros and cons of Christine's imaginary friend.

The team investigates when a wealthy teacher is found dead in an abandoned bookstore; one of Brennan's interns teaches her to use Twitter.

The team investigates a local bakery after the body of an ex-con is found in pieces; Arastoo Vaziri considers visiting his dying brother in Iran, which causes friction between him and Cam.

The team investigates the death of a mini-golf superstar; Brennan worries her father is returning to a life of crime; Wendell asks Hodgins to help restore his girlfriend's family heirloom.

Booth and Brennan go undercover into the world of underground poker to investigate the death of a high-stakes gambler -- putting Booth at risk of relapsing; Hodgins creates a new lab-related product; Booth and Brennan receive exciting news.

The team investigates when the remains of a celebrity chef are discovered at a local park; Booth and Brennan must question the staff at the Royal diner; Hodgins sells his invention for millions; Brennan teaches Christine about bones.

Brennan and Booth suspect bullying as a factor in the death of a private high school student.

With 48 hours until Alex Rockwell is executed, the team races to prove Brennan's suspicion that he didn't commit the murders of which he was convicted.

When a member of the Iranian parliament kidnaps Arastoo to have him help with a murder case, the team races to identify the killer; Brennan turns to Aubrey for help when she learns the truth about Booth's gambling.

A well-known cookie jar collector's corpse is discovered in a riverbank; Booth struggles with Brennan's decision; Aubrey is interested in one of the "squinterns."

The NCIS team tries to narrow down the motive when a Navy recruiter is murdered in a hit-and-run; Lasalle worries about his brother.

Pride believes Baitfish has returned and has the NCIS team chase down leads in an attempt to locate him.

When a sailor is killed in a strip club, the murder weapon turns out to be linked to other unsolved cases; Brody receives a visit from her ex-fiance.

During the autopsy of a petty officer who seems to have died of natural causes, an armed man holds Wade, Sebastian and Danny hostage in the morgue.

When a Navy commander's car is stolen with his baby inside, the team must determine if it was a targeted abduction.

LaSalle's brother, Cade, needs the team's help when he becomes a murder suspect -- and cannot remember what happened; LaSalle is determined to prove Cade's innocence, despite the wealth of evidence against him.

Baitfish murders a person close to the team in order to send a message to Pride; a citywide hunt for the elusive criminal takes place.

Pride has suspicions about a mole; new intelligence comes to light that indicates a breach at the ports.

Chin Ho shares news about Joe White that rocks McGarrett to his core; Danny is forced to play midwife when his ex goes into early labor.

When Danno and his family are targeted by a vengeful dirty cop from Danno's past, the team steps in to help.

When the team almost causes an international incident, Lt. Gov. Denning decides that one of them should be fired; Chin Ho faces the harrowing task of choosing a Valentine's Day gift for Malia.

The team investigates when a man dressed as a Hawaiian NaKoa warrior is found dead near the site of a war re-enactment.

The team crosses paths with a retired NYPD bomb expert while investigating the death of a famous talk-radio host.

When McGarrett's sister is arrested for smuggling diamonds, he enlists the help of an ex-con to set up a sting.

Max reveals shocking information about his childhood to help the team track a serial killer who may have ties to Max's past.

When a suspect threatens to release a deadly virus, the Five-0 teams up with Special Agents G. Callen (Chris O'Donnell) and Sam Hanna (LL Cool J).

When McGarrett finally gets to Wo Fat, he is stunned to learn that the Japanese Yakuza wants them both dead.

The team goes on a manhunt when one of its own is killed; a team member must choose which one of their kidnapped loved ones will survive.

Following the murder of an important family member, the team searches for Delano and Wo Fat.

McGarrett asks Catherine to help find his mother; the teams seek assistance from August March (Edward Asner) with a deadly art heist.

Danny and McGarrett's day at sea takes a deadly turn when their boat is hijacked.

McGarrett's mom pays him an unexpected visit while the team investigates a polo player's death.

As the team investigates a grisly murder, evidence suggests the killer is about to strike again.

Danny must hold completely still as technicians disarm a bomb he accidentally activated; McGarrett tries to distract his partner by sharing a story about a tough case.

When a woman from Cabe's past asks for help apprehending a war criminal, the members of Team Scorpion travel to Cuba.

Sylvester goes under cover in a federal prison in hope of saving three judges' lives; the team must orchestrate a prison break when Sylvester's life is threatened.

An explosion sends a top-secret submarine to the bottom of the ocean with limited oxygen, a self-destruct function that's about to activate, and Walter, Cabe and Happy on board.

The members of the team go under cover on a movie set in Kazakhstan in hopes of disabling a Soviet-era nuclear missile being sold by terrorists.

When Elvis Bertrand's "daughter" is linked to a murder case, he asks Pride to prove her innocence.

Tammy is convinced that a con man committed the hit-and-run murder of a Navy doctor, even though the evidence shows otherwise; unbeknownst to Hannah, her husband approaches Pride with new intel on an underground spy network.

The NCIS team investigates a deadly bombing at a military museum event with over 1,000 people in attendance.

Pride and LaSalle travel to war-torn South Ossetia to locate an FBI agent who was kidnapped during a failed mission to apprehend the leader of Apollyon, the underground spy network responsible for murdering Pride's father.

After tracking Apollyon, a deadly underground spy network, to war-torn South Ossetia, Pride is separated from the team and faces grave danger; in order to save Pride, the NCIS team must locate a mole who continues to feed information to Apollyon.

Pride must cut his vacation short when Hannah is suspended for breaking protocol during a joint investigation with the FBI.

A Navy pilot says she saw an unidentified object prior to a private plane crash; Pride suffers from insomnia and nightmares as a result of being kidnapped and drugged last year.

Pride travels to New York City after new DNA evidence is linked to a 20-year-old cold case from his past.

The team uncovers a sinister plot by a private detention center contracted by the government to house undocumented immigrants; Lasalle and Sebastian travel to Alabama to search for Lasalle's missing brother.

Navy Lt. Max Landry asks the New Orleans field office for help when he suspects his girlfriend is a spy; LaSalle faces another devastating dead end as he searches for his brother's last known whereabouts.

LaSalle hopes to avenge his brother's murder by tracking a drug ring in Alabama he believes is responsible; when Pride assists with the case, he crosses paths with Eddie Barrett, an elusive individual who knows more than he is sharing.

Following a natural gas explosion at a movie theater, the team discovers the gas company has been hacked and more explosions could be triggered.

Sebastian calls the team to assist with a possible kidnapping case when a dignitary's son he was assigned to protect disappears from a local concert venue.

After Eddie Barrett provides an alibi witness, Pride and the team are more determined than ever to find a break in the case and avenge LaSalle's murder.

Pride is cut off from the team and backed into a corner after the investigation into Eddie Barrett uncovers a malicious plot.

The team is concerned when Sebastian becomes unreachable while under cover as a new recruit.

The team must track down a mysterious female assassin responsible for murders in Athens, Rome and London; Wade's son begs her to allow him to go on a police ride-along for an article he's writing on a youth outreach program.

The team investigates the murder of a JAG captain who was discovered at home by his daughter, the only heir to his large estate; Sebastian is intimidated when he is put in charge of a team on his first day of training.

When Pride is unable to sleep due to continuing nightmares about the mysterious man in the red suit; he undergoes a specialized treatment to help him figure out the man's identity; an arrogant new officer joins the team.

Tammy must protect a teenage girl after her father is shot in their home; the rest of the team searches for a motive.

The team must intervene when Paige and Ralph are on a sabotaged, runaway subway train; Toby tries to impress Happy during his first boxing match.

The members of Team Scorpion take a lucrative job locating a top-secret aircraft in Area 51 for the CIA.

Team Scorpion is blackmailed into breaking into the United Nations to help with the assassination of an arms dealer; Sylvester tries to protect Megan's wishes.

When the team and Walter's parents visit Megan in the hospital, a deadly fungus outbreak occurs, forcing everyone into quarantine.

Bizarre occurrences distract investigators as they track a serial killer who struck during an eclipse of the sun.

The investigation into a model's murder sends Horatio back to prison, where he must work with a former nemesis to clear his son's name.

A family vacation turns deadly, forcing the CSI team to find the killer before the survivors decide to seek justice on their own.

Calleigh's professional and personal life are in danger after someone attempts to murder her.

A wealthy family's nanny is found stabbed to death in their home during a party.

The team investigates a home invasion that turned deadly after a dangerous "monster" escaped from the basement; Max returns to Oahu with a very special guest.

A deadly hit-and-run involves a driverless car carrying heroin; Tani and Quinn are stuck with a pair of YouTubers who are brought on a ride-along.

When the CIA informs McGarrett that his mother has gone rogue on her undercover mission and may have killed her partner, Steve goes to Mexico to bring her home and prove her innocence.

The team searches for a killer whose plane crashed in the jungle with $10 million worth of heroin on board; Grover is thrilled when his niece Siobhan comes to try out for the University of Hawaii basketball team.

Junior and Tani track down the thief who robbed his parents' home; Five-0 investigates the murder of a beloved philanthropist and the theft of his valuable koa tree; Danny moves in with McGarrett.

When Adam's girlfriend is kidnapped right in front of him, he shuts out Five-0 and breaks all the rules in order to get her back; the team investigates three seemingly unconnected homicides.

A tourist helicopter is shot down by a missile; a search for stolen artillery leads to a ghost from McGarrett's past -- Wo Fat; Adam makes a bold decision about his future with Five-0.

When a list of undercover CIA agents is stolen, the team enlists the help of Magnum, Higgins, Rick and TC to get it back and protect national security; Higgins gives Tani some personal advice.

Grover and the team investigate a murder at a private golf course involving a man who was frozen to death in the locker room's cryotherapy chamber; McGarrett tags along with Danny when he tracks down the father of a boy who has been bullying Charlie.

Soon after Danny meets the girl of his dreams, they get into a potentially fatal car accident in an area far from help; McGarrett enlists Quinn and Tani to help when Eddie the dog suddenly shows signs of post-traumatic stress disorder.

When Grover's niece goes missing from the police academy, it's discovered that her boyfriend is an undercover member of the yakuza.

On Valentine's Day, Tani and Noelani are held hostage during a convenience store robbery; the team investigates the murder of a Thai diplomat whose wife confesses to the crime, but Danny suspects she's covering for the real killer.

Harry Langford helps Five-0 investigate some murders that follow the plot of a fabled, unpublished crime novel from the 1920s; Tani and Junior's friendship takes a meaningful new turn.

The team investigates a murder on a cargo ship where pirates impersonated the Coast Guard to board the boat; Adam finally gets the evidence he needs to take down the island's Yakuza operation once and for all.

A rancher is murdered after he uncovers human skeletons where legend says that Civil War-era gold coins are buried; Quinn's former stepdaughter reaches out to her for help after her father doesn't come home.

Mac and Jack must track down a corrupt FBI agent who has framed a man for murder; everyone on the team is terrified to get a performance review from the tough new boss.

When Matty's goddaughter and her boyfriend are killed in a San Francisco park, Mac and the team investigate the crime and start to suspect that the 1970s Zodiac Killer has returned.

While Mac and Jack are tracking a dangerous fugitive, a family of bounty hunters kidnap him; Bozer and Riley try to hack into Jack's CIA file.

When Mac and the team are blamed for a terrorist bombing, the Phoenix Foundation is forced to disavow them; the team must clear their names without support from back home.

After an earthquake in Hawaii, Mac and the team join Chin and Kono from the Five-0 task force to rescue a group of government scientists trapped in a building; another group tries to steal top-secret weaponry from the scientists.

Mac's close friend from M.I.T. fakes her own death to prevent someone from killing her to suppress her scientific research.

When the team intercepts a terror group's message for Murdoc, instructing him to kill a tech analyst, Mac poses as a psychopath to save the intended victim.

Murdoc moves ahead with his plans for revenge against MacGyver by recruiting his recently released former cellmate to infiltrate the Phoenix Complex and kill every agent inside.

Soon after the BAU steps in to help local law enforcement isolate a suspect for a murder, a second person who is related to the first victim is killed under similar circumstances; Prentiss is concerned about Garcia's behavior.

The BAU investigates a spooky local ghost story of the "Tall Man" and the clues it provides when two people go missing in the woods; a third person mysteriously surfaces the following day with limited details as to what happened to her friends.

The BAU investigates four murders along the eastern seaboard; the crimes become personal for Alvez when the team discovers there are ties to his time spent in pursuit of a notorious hit man; Alvez and his girlfriend decide to move in together.

The BAU races to capture the vigilantes behind a series of attacks taking place every 27 minutes in the nation's capital; Prentiss and Unit Chief Andrew Mendoza lead the effort to identify the vigilantes and what's motivating them.

The BAU investigates a double homicide and kidnapping in New Hampshire; Rossi's plans to elevate his relationship with Krystall don't go as planned.

A professor from Lewis' past tips off the BAU to an alarming number of overdose deaths of patients who just completed rehab.

Prentiss faces her past when the BAU is sent to investigate the murders of prominent businessmen, all of whom are missing their hearts; Prentiss plans a romantic first date with Mendoza, but the evening is cut short by an urgent call from Rossi.

The BAU team heads to Portland, Ore., to investigate a chilling abduction that may be linked to a local couple who were killed in their home a week earlier.

The BAU team flies to Iowa to investigate the disappearance of three 10-year-old children who appear to have been abducted from their homes, with surveillance video from a park as their only lead to finding the children's whereabouts.

Rossi questions his actions in the aftermath of a struggle with a serial killer who appears to have outsmarted the BAU.