When Todd reunites with a childhood friend with a checkered past, he convinces Margaret to represent him in a minor legal case.

Gibbs, still recovering from his gunshot wound, pushes the team to investigate the body of a bludgeoned sailor, found at an illegal nightclub.

A man is murdered while trying to learn how to pick up women at a hip Miami nightclub.

At Halloween, the team takes on a case to prove the existence of ghosts on the Queen Mary but find a ship on a deadly collision course; Walter considers taking note of Paige's interests to benefit their relationship.

Harm risks his career during the murder investigation of an old friend as he butts heads with a gritty Navy detective.

Harm is held captive by a renegade government agent who plans to assassinate a key witness in an upcoming trial.

A Triad assassin poisons a Homeland Security agent; the discovery of a warehouse of counterfeit purses reveals a money trail to stolen government funds; Nell joins the team in the field.

In July of 2000, 18-year-old Tina Wu was murdered and her younger sister Theresa suffered horrific injuries when an attacker broke into their Toronto apartment.

The small Ontario town of Woodstock was the setting for one of Canada's most horrific child murders; through in-depth interviews with the families and investigators, we reveal the toll this small-town tragedy has taken on many lives.

In 2018, three women held hostage in a motel room by armed men face a night of terror that leaves 19-year-old Amber Meadows lying dead in the bathroom; detectives must follow a trail of surveillance footage to find out who pulled the trigger.

The case of a murdered sailor, $100 million in gold bullion and a ghost ship in the Great Lakes Triangle tests feuding Fraser and Kowalski.

Ray and Kowalski help a small-town sheriff when the town's baseball team becomes a target of sabotage attempts.

In 2020, 21-year-old Dioneth Lopez goes missing while on a trip to visit friends. Her body turns up in the woodlands of Washington State. She is treated as a Jane Doe until detectives find surveillance footage that pieces together her final hour.

In 2018, three women held hostage in a motel room by armed men face a night of terror that leaves 19-year-old Amber Meadows lying dead in the bathroom; detectives must follow a trail of surveillance footage to find out who pulled the trigger.

Harm seeks the assistance of a forensic pathologist when the remains of a Navajo Indian who may have been a World War II hero are unearthed.

Harm defends a fighter pilot accused by the Italian government of causing the crash of a sightseeing helicopter; guest Anne-Marie Johnson.

Margaret and Todd work to bring justice to an Olympic athlete who lost his leg in a plane crash resulting from a defective aircraft.

The team finds a problem with the DNA samples collected while investigating the crash of a military plane that was transporting caskets.

A device that can prevent a nuclear meltdown is tracked through the Los Angeles sewers; Walter learns to listen and not offer advice to Paige; the team meets their new neighbor.

When a female executive is shot at an afternoon concert, the evidence leads the team to suspect that the dreaded Mala Noche gang has struck again.

Harm seeks the assistance of a forensic pathologist when the remains of a Navajo Indian who may have been a World War II hero are unearthed.

Harm defends a fighter pilot accused by the Italian government of causing the crash of a sightseeing helicopter; guest Anne-Marie Johnson.

When a female executive is shot at an afternoon concert, the evidence leads the team to suspect that the dreaded Mala Noche gang has struck again.

A device that can prevent a nuclear meltdown is tracked through the Los Angeles sewers; Walter learns to listen and not offer advice to Paige; the team meets their new neighbor.

Margaret and Todd work to bring justice to an Olympic athlete who lost his leg in a plane crash resulting from a defective aircraft.

Gibbs and his team track a former Navy SEAL (guest star Tim Abell) who escapes from prison looking for revenge.

When a female executive is shot at an afternoon concert, the evidence leads the team to suspect that the dreaded Mala Noche gang has struck again.

A device that can prevent a nuclear meltdown is tracked through the Los Angeles sewers; Walter learns to listen and not offer advice to Paige; the team meets their new neighbor.

Harm seeks the assistance of a forensic pathologist when the remains of a Navajo Indian who may have been a World War II hero are unearthed.

Harm defends a fighter pilot accused by the Italian government of causing the crash of a sightseeing helicopter; guest Anne-Marie Johnson.

The murder of a Navy machinist sends the team on a citywide hunt for evidence; Anna Kolcheck (Bar Paly) partners with Callen and Sam in the on-going mole investigation.

Documenting the battles Tori's family endured to ensure the perpetrators serve their sentences as outlined by the courts; this was a fight that has further challenged their healing process.

When Ryan Lane broke up with the mother of his child, his world fell apart; the two parents were fighting over custody of their little girl; Ryan finally went to court where he was granted visitation.

On Valentine's Day, police discover Demetrius Graves fatally stabbed on the street; two days later, Bonnie Ross turns up dead at home; a trail of CCTV evidence uncovers that these two very different people share one fateful connection.

Fraser must protect his friend from a criminal when the two men witness a jewelry heist.

When a pretzel vendor is gunned down in the park, Fraser investigates the crime, with surprising results.

In 2010, three men are murdered in a convenience store in Minneapolis's Somali community; the store's CCTV system uncovers evidence of a robbery gone wrong; footage from cameras around the city could offer clues to the killer's identity.

On Valentine's Day, police discover Demetrius Graves fatally stabbed on the street; two days later, Bonnie Ross turns up dead at home; a trail of CCTV evidence uncovers that these two very different people share one fateful connection.

Chaos reigns during the three days leading up to Bud and Harriet's (Patrick Labyorteaux, Karri Turner) wedding. With David James Elliott and Catherine Bell.

Harm travels to Russia with Mac after uncovering evidence that his father is alive and living in Siberia.

Margaret attempts to join an elite philanthropy club and must represent a former club employee accused of using the organization to smuggle drugs; Todd goes under cover as a waiter at the elite club to get information to help Margaret's case.

Ziva and Gibbs head to a missing Marine's last-known whereabouts in Afghanistan; Tony's fears are revealed.

Team Scorpion visits a renaissance festival, but the revelry is cut short when a group tries to rob a nearby police evidence locker; Paige grows weary of Walter pointing out the historical inaccuracies at the festival.

Evidence shows that a series of murders is linked to organized crime, but it also leads Horatio and the team to a pair of film students whose screenplay mirrors the details of the crimes.

Chaos reigns during the three days leading up to Bud and Harriet's (Patrick Labyorteaux, Karri Turner) wedding. With David James Elliott and Catherine Bell.

Harm travels to Russia with Mac after uncovering evidence that his father is alive and living in Siberia.

Evidence shows that a series of murders is linked to organized crime, but it also leads Horatio and the team to a pair of film students whose screenplay mirrors the details of the crimes.

Team Scorpion visits a renaissance festival, but the revelry is cut short when a group tries to rob a nearby police evidence locker; Paige grows weary of Walter pointing out the historical inaccuracies at the festival.

Margaret attempts to join an elite philanthropy club and must represent a former club employee accused of using the organization to smuggle drugs; Todd goes under cover as a waiter at the elite club to get information to help Margaret's case.

Gibbs and his team are called to investigate when a fellow NCIS agent is found murdered. Guest star: Tim Kelleher.

Evidence shows that a series of murders is linked to organized crime, but it also leads Horatio and the team to a pair of film students whose screenplay mirrors the details of the crimes.

Team Scorpion visits a renaissance festival, but the revelry is cut short when a group tries to rob a nearby police evidence locker; Paige grows weary of Walter pointing out the historical inaccuracies at the festival.

Chaos reigns during the three days leading up to Bud and Harriet's (Patrick Labyorteaux, Karri Turner) wedding. With David James Elliott and Catherine Bell.

Harm travels to Russia with Mac after uncovering evidence that his father is alive and living in Siberia.

A maintenance worker with a dark history puts a local teenager in danger; Sam has to choose which of his colleagues he'll take to the football game.

Looking into some of Canada's most infamous criminal cases with extensive archives and intimate family interviews and exploring the lasting impacts on the community and justice system.

Looking into some of Canada's most infamous criminal cases with extensive archives and intimate family interviews and exploring the lasting impacts on the community and justice system.

In 2018, an explosion kills Anthony House on his doorstep; as police investigate, another bomb goes off, killing teen Draylen Mason; it becomes clear that Austin, Texas, is under attack from a serial bomber; police must use CCTV to track him down.

Fraser (Paul Gross) arrests a legendary poker player and becomes entangled in a federal investigation.

Kowalski and Fraser must investigate a policeman's homicide to save the victim's wife from getting the death penalty.

In 2017, in San Diego, 28-year-old musician Omar Medina goes missing; his family's worst fears are confirmed when his body turns up in a barrel floating in the bay; police turn to surveillance footage to track down the people responsible.

In 2018, an explosion kills Anthony House on his doorstep; as police investigate, another bomb goes off, killing teen Draylen Mason; it becomes clear that Austin, Texas, is under attack from a serial bomber; police must use CCTV to track him down.

Adm. Chegwidden travels to Moscow to begin his own investigation after hearing reports that Harm and Mac perished there in a plane crash.

While at the Sudanese Embassy, Harm, Mac and other dignitaries are taken hostage by a band of terrorists led by an ambitious government official.

Margaret and Francey enlist the help of a popular true crime podcaster to help exonerate a client who is serving a life sentence; Todd solicits dating advice from his sister and Susan when sparks fly between him and Lea.

Anthony DiNozzo Sr. (Robert Wagner) is found in a car with no memory of the previous night and a dead body in the trunk; Tony goes against orders as he tries to establish his father's innocence.

Team Scorpion becomes stranded on a floating island of trash they were trying to destroy; Toby works with Cabe to uncover the details of his father's death.

When a body is found during a beach volleyball tournament, the evidence leads Horatio to his nemesis, Walter Resden, who is now targeting a person Horatio has sworn to protect.

Adm. Chegwidden travels to Moscow to begin his own investigation after hearing reports that Harm and Mac perished there in a plane crash.

While at the Sudanese Embassy, Harm, Mac and other dignitaries are taken hostage by a band of terrorists led by an ambitious government official.

When a body is found during a beach volleyball tournament, the evidence leads Horatio to his nemesis, Walter Resden, who is now targeting a person Horatio has sworn to protect.

Team Scorpion becomes stranded on a floating island of trash they were trying to destroy; Toby works with Cabe to uncover the details of his father's death.

Margaret and Francey enlist the help of a popular true crime podcaster to help exonerate a client who is serving a life sentence; Todd solicits dating advice from his sister and Susan when sparks fly between him and Lea.

When a Marine explosives expert disappears outside a nightclub, Gibbs and his agents are summoned to investigate.

When a body is found during a beach volleyball tournament, the evidence leads Horatio to his nemesis, Walter Resden, who is now targeting a person Horatio has sworn to protect.

Team Scorpion becomes stranded on a floating island of trash they were trying to destroy; Toby works with Cabe to uncover the details of his father's death.

Adm. Chegwidden travels to Moscow to begin his own investigation after hearing reports that Harm and Mac perished there in a plane crash.

While at the Sudanese Embassy, Harm, Mac and other dignitaries are taken hostage by a band of terrorists led by an ambitious government official.

Callen poses as a patient in a mental health facility to find an NSA agent who vanished while tracking an ISIS cell that was attempting to cross the Mexican border.

When a triple-murder nearly wipes out an entire family, police struggle to establish a motive; at the home, investigators discover a gruesome scene and identify an unexpected murder weapon: a crossbow.

After a torso is found floating in the Oshawa Harbour, the family of 18-year-old Rori Hache is horrified to learn the human remains belong to the missing teen.

Choir director Kathy Blair's son discovers her murdered at home; detectives find camera footage containing a shadowy figure that might just be their killer; the murder of a couple nearby sparks fears this might be the work of a serial killer.

After a voodoo priest dies, Fraser and Kowalski (Paul Gross, Callum Keith Rennie) investigate a secretive Haitian community.

Fraser sings backup for a Canadian country-western singer (Michelle Wright) who has received death threats.

In 2017, Alisha Canales-McGuire is shot dead at her sister's house; evidence points to a targeted attack, but detectives can find no motive until CCTV and social media lead to a tangled murder plot and a twist of fate.

Choir director Kathy Blair's son discovers her murdered at home; detectives find camera footage containing a shadowy figure that might just be their killer; the murder of a couple nearby sparks fears this might be the work of a serial killer.

The future of American and Japanese relations is at stake when Harm and Mac go to Tokyo to defend an ensign accused of rape.

The shocking rise and fall of Paolo Macchiarini, the superstar celebrity surgeon who ascended to global fame after performing the world's first synthetic organ transplant, only to be exposed as an international con man. His web of lies spanned decades, ensnared many, including those in his personal life, leaving a trail of devastated patients to grapple with a nightmare.

A woman with a secret life is faced with revealing her secret when she discovers that her brother-in-law is cheating on her sister; a woman has information about her sister's husband's untimely death.

After losing his job, a man secretly chooses a career to support the expensive lifestyle that he and his girlfriend have grown accustomed to; a brother discovers a disturbing truth about his identical twin that may jeopardize his entire family.

A convicted child molester is found murdered in Alexx's neighborhood.

The future of American and Japanese relations is at stake when Harm and Mac go to Tokyo to defend an ensign accused of rape.

Chegwidden learns his kidnapped daughter was seeing a Mafia scion, who may be linked to illegal arms sales.

When searching for a missing woman, law enforcement on Long Island stumble upon the remains of other victims; as the killer of the so-called "Gilgo Four" remains elusive, police come to believe that the monster himself may live among them.

After Rex Heuermann is arrested and charged as the Gilgo Beach killer, a feverish hunt for information is undertaken - but his family isn't talking; now, for the first time, the loved ones of the alleged killer speak publicly.

With a mountain of seemingly damning evidence stacking up against him, Rex Heuermann's family struggles to understand how their beloved patriarch could be the monstrous serial killer law enforcement claims he is.

The shocking rise and fall of Paolo Macchiarini, the superstar celebrity surgeon who ascended to global fame after performing the world's first synthetic organ transplant, only to be exposed as an international con man. His web of lies spanned decades, ensnared many, including those in his personal life, leaving a trail of devastated patients to grapple with a nightmare.

A woman with a secret life is faced with revealing her secret when she discovers that her brother-in-law is cheating on her sister; a woman has information about her sister's husband's untimely death.

After losing his job, a man secretly chooses a career to support the expensive lifestyle that he and his girlfriend have grown accustomed to; a brother discovers a disturbing truth about his identical twin that may jeopardize his entire family.

A grieving daughter goes after her father's killer in court; a convicted murderer's wife screams in protest; the widow and coconspirator of a dirty cop begs the judge for mercy.

An online pimple popper is accused of in-court drug use; a judge mutes a foulmouthed murderer; a woman stabs her husband 14 times before calling 911.

26-year-old Chantel Moore was shot and killed by a New Brunswick police officer during a wellness check; police had been called to her apartment over concerns that Chantel was being stalked and could be in danger.

While visiting India, a young newlywed from British Columbia was attacked, kidnapped, and her lifeless body discovered in a canal the next day.

A motorist shoots dead Whitney Gray while she shops with her young kids and teenage niece; detectives follow a trail of CCTV to track down the suspect car and discover that the killer is on the run and carrying a stash of weapons.

Fraser and Ray arrest a mob boss who, in turn, threatens the Chicago Police Department with a harassment suit.

A murder-for-hire business has a unique body-disposal system.

On April 3rd, 2017, Assistant Chief Deputy Clint Greenwood is shot dead at point blank range at the Harris County Courthouse outside Houston, Texas; no eye witnesses, but maybe security cameras lead them to Clint's killer.

A motorist shoots dead Whitney Gray while she shops with her young kids and teenage niece; detectives follow a trail of CCTV to track down the suspect car and discover that the killer is on the run and carrying a stash of weapons.

Disaster results after Harm volunteers to defend a troubled Vietnam veteran accused of aiding a fellow patient's suicide.

A defendant escapes from a virtual hearing; a furious judge is done with a criminal driver; a convicted murderer makes a deadly escape.

A reality TV star breaks down crying; a grandma makes a scene in the courtroom; a murder suspect barks at the judge.

A son and daughter denounce their murderous father; a drunken driver breaks down in court; a misbehaving spectator feels the judge's wrath.

A high-speed chase across three states; a woman pulled over for speeding flees the scene but still manages to obey traffic laws; suspected auto thieves flee a hit-and-run to hide on a golf course.

Engaging in a deadly gun battle at the end of a high-speed pursuit; tracking down a car thief who's attempting a water escape in a stolen kayak; outwitting a fugitive driving recklessly on a motorcycle.

An accused car thief jumps off a 36-foot bridge to avoid capture; an armed fugitive on the run breaks into a building full of law school students; a DUI suspect flees by car, foot, and water before deputies capture him.

Stories of children killing a family member.

As their murder investigation intensifies, Horatio must ask Natalia to reveal a secret from her past to help solve the case.

Disaster results after Harm volunteers to defend a troubled Vietnam veteran accused of aiding a fellow patient's suicide.

Harm goes head to head with Mac in the courtroom while defending a Marine guard for shooting a terrorist prisoner.

When talented show jumper Katie Simpson dies, those close to her believe she's been murdered.

When Katie Simpson dies unexpectedly, the horse community accepted that she had taken her own life, but a local journalist questioned the official conclusion; revealing how a secret investigation ended in a high stakes murder trial.

When Katie Simpson died unexpectedly in 2020, the horse community accepted that she had taken her own life but a local journalist questioned the official conclusion; revealing how a secret investigation ended in a high stakes murder trial.

Engaging in a deadly gun battle at the end of a high-speed pursuit; tracking down a car thief who's attempting a water escape in a stolen kayak; outwitting a fugitive driving recklessly on a motorcycle.

An accused car thief jumps off a 36-foot bridge to avoid capture; an armed fugitive on the run breaks into a building full of law school students; a DUI suspect flees by car, foot, and water before deputies capture him.

Stories of children killing a family member.

A defendant escapes from a virtual hearing; a furious judge is done with a criminal driver; a convicted murderer makes a deadly escape.

A reality TV star breaks down crying; a grandma makes a scene in the courtroom; a murder suspect barks at the judge.

A son and daughter denounce their murderous father; a drunken driver breaks down in court; a misbehaving spectator feels the judge's wrath.

A high-speed chase across three states; a woman pulled over for speeding flees the scene but still manages to obey traffic laws; suspected auto thieves flee a hit-and-run to hide on a golf course.

Engaging in a deadly gun battle at the end of a high-speed pursuit; tracking down a car thief who's attempting a water escape in a stolen kayak; outwitting a fugitive driving recklessly on a motorcycle.

An accused car thief jumps off a 36-foot bridge to avoid capture; an armed fugitive on the run breaks into a building full of law school students; a DUI suspect flees by car, foot, and water before deputies capture him.

Stories of children killing a family member.

Jules Knox goes through the many twists and turns of a mishandled investigation, family outrage and an exclusive interview with Arlene's husband and the accused, Bert Westervelt.

In the fall of 2016, a football player went out with his teammates to celebrate an important win when tragedy struck; witnesses explain what they saw that fateful night and how Hicks was blindsided.

On April 3rd, 2017, Assistant Chief Deputy Clint Greenwood is shot dead at point blank range at the Harris County Courthouse outside Houston, Texas; no eye witnesses, but maybe security cameras lead them to Clint's killer.

Fraser and Ray investigate after witnessing men in a white limousine abduct a teen girl from a shopping mall.

A female Mountie, who comes to Chicago after two murder suspects, has a strange attraction for Fraser.

Shirley Shell is a loving wife and the dedicated mother of three children and two grandchildren, but in 2007, Shirley is found brutally murdered at home in Edmond, Okla.

On April 3rd, 2017, Assistant Chief Deputy Clint Greenwood is shot dead at point blank range at the Harris County Courthouse outside Houston, Texas; no eye witnesses, but maybe security cameras lead them to Clint's killer.

A pilot submits his resignation after claiming to have heard a voice that told him not to fire on an Iraqi fighter.

Harm is assigned to a congressional committee investigating a TV reporter's story that accuses U.S. forces of using chemical weapons in the Gulf War.

When Margaret is disappointed that no one but Todd can attend her family Thanksgiving dinner, Todd tries to convince his brother to come home; Margaret's family inadvertently helps her crack a case involving an injured bank teller and robbery.

When a Navy captain is killed, the team must find and protect his pregnant companion; Jimmy brings his fiancee's father to work.

Team Scorpion tries to help a father and his daughter when their plane crashes nearby; Paige helps Walter navigate his feelings about Cabe's possible future in prison.

When a corpse is recovered, the team finds evidence against a man formerly vindicated of killing his wife and dumping her body in the ocean.

A pilot submits his resignation after claiming to have heard a voice that told him not to fire on an Iraqi fighter.

Harm is assigned to a congressional committee investigating a TV reporter's story that accuses U.S. forces of using chemical weapons in the Gulf War.

When a corpse is recovered, the team finds evidence against a man formerly vindicated of killing his wife and dumping her body in the ocean.

Team Scorpion tries to help a father and his daughter when their plane crashes nearby; Paige helps Walter navigate his feelings about Cabe's possible future in prison.

When Margaret is disappointed that no one but Todd can attend her family Thanksgiving dinner, Todd tries to convince his brother to come home; Margaret's family inadvertently helps her crack a case involving an injured bank teller and robbery.

Gibbs and his team are called to investigate when the grisly remains of a Marine ordnance specialist are found.

When a corpse is recovered, the team finds evidence against a man formerly vindicated of killing his wife and dumping her body in the ocean.

Team Scorpion tries to help a father and his daughter when their plane crashes nearby; Paige helps Walter navigate his feelings about Cabe's possible future in prison.

A pilot submits his resignation after claiming to have heard a voice that told him not to fire on an Iraqi fighter.

Harm is assigned to a congressional committee investigating a TV reporter's story that accuses U.S. forces of using chemical weapons in the Gulf War.

An attack on a graduate student working on a new electromagnetic weapon for the Navy is linked to international warfare; Kensi struggles with physical therapy for her spinal injury.

When Canadian boxing star Eddie "Hurricane" Melo is killed, investigators start digging into his connections to the Montreal Mafia; Mark Carcasole reports on the theories, the arrests and how Melo's daughter is keeping her father's memory alive.

Four men were gunned down in their prime, shot and killed in three separate shootings; investigators would discover that the murders were all connected, and the evidence would lead them to a serial killer hungry for notoriety and fame.

Josh Richards is shot execution style in the middle of a nightclub in Appleton, Wis.; when detectives delve deeper into the investigation, they discover a camera has the potential to reveal the identity of a killer.

Ice-fisherman Fraser catches a corpse, finds another, and gets chased by bad guys with grenade launchers.

Fraser and Kowalski pursue an arms dealer to the Yukon, where they join forces with Buck Frobisher's (Leslie Nielsen) detachment.

A 24-year-old Yale Ph.D. student named Annie Le goes missing; CCTV shows Annie arrive at Yale, but she is not seen leaving; police search every inch of the building, until they find something horrific.

Josh Richards is shot execution style in the middle of a nightclub in Appleton, Wis.; when detectives delve deeper into the investigation, they discover a camera has the potential to reveal the identity of a killer.

Harm (David James Elliott) defends a secretive Mac (Catherine Bell) when she is put on trial for a despicable crime.

Harm and Mac are sent on a covert mission to Iran to recover a downed pilot and his $80 million jet without letting the Iranians know.

When Lyle's niece is accused of committing a crime on her college campus, Lyle enlists Margaret and Todd to vindicate her.

The investigation of a Navy commander's murder leads the team to E.J. Barrett, and a second death prompts the team to protect E.J. as they hunt the killer.

The team anxiously awaits the verdict of Cabe's trial which could send him to prison; they use their nervous energy to try saving a dog stuck in a cistern.

Horatio must protect Marisol when her life is threatened after she witnesses a robbery.

Harm (David James Elliott) defends a secretive Mac (Catherine Bell) when she is put on trial for a despicable crime.

Harm and Mac are sent on a covert mission to Iran to recover a downed pilot and his $80 million jet without letting the Iranians know.

Horatio must protect Marisol when her life is threatened after she witnesses a robbery.

The team anxiously awaits the verdict of Cabe's trial which could send him to prison; they use their nervous energy to try saving a dog stuck in a cistern.

When Lyle's niece is accused of committing a crime on her college campus, Lyle enlists Margaret and Todd to vindicate her.

Gibbs and his team believe the accidental death of a Navy SEAL, during a routine exercise, was murder.

Horatio must protect Marisol when her life is threatened after she witnesses a robbery.

The team anxiously awaits the verdict of Cabe's trial which could send him to prison; they use their nervous energy to try saving a dog stuck in a cistern.

Harm (David James Elliott) defends a secretive Mac (Catherine Bell) when she is put on trial for a despicable crime.

Harm and Mac are sent on a covert mission to Iran to recover a downed pilot and his $80 million jet without letting the Iranians know.

Callen must interrogate his father after he is found in a patient's hospital room during a radiation poisoning case; members of the team discusses their plans for Thanksgiving.

An unknown driver shot and killed Constable André Lalonde, known for his friendly nature and big mustache, and 25 years later, Mike Armstrong explores the impact of his murder on Lalonde's wife and two children and the continuing hunt for the killer.

A young woman disappears in Calgary, Canada, and a 911 call results in the discovery of an older couple dead in their home, leading police to uncover the tragic connection between the two cases as they discover evidence of a senseless killing spree.

In June 2016, Larry Weaver decides to spend the night in Sikeston, Mo., while on his way home to his wife; there's no sign of him or his bike the next day, but security cameras could help the police.

Fraser gets temporary custody of a 12-year-old purse snatcher who is connected to the armed robbery he and Ray are investigating.

Fraser and Ray investigate an insurance scam involving professional boxing while a wolf cruises Chicago looking for a good time.

A family's worst nightmare begins when 23-year-old Christina Morris goes missing while out with friends in Plano, Texas; police franticly search to find her alive, but it's the discovery of surveillance camera footage that reveals the shocking truth.

In June 2016, Larry Weaver decides to spend the night in Sikeston, Mo., while on his way home to his wife; there's no sign of him or his bike the next day, but security cameras could help the police.

The crew gets stuck in the office during a Christmas Eve blizzard; Mac investigates charges of abuse; Bud faces a daunting challenge.

Harm and Mac are assigned to prosecute three sailors who are charged with the brutal beating of a man whom they claim raped their shipmate.

Margaret asks Todd for help on a seemingly straightforward wrongful termination case over a dating app, but with Todd's investigation, they quickly realize it's much more complicated; tensions between Margaret and Gus simmer.

NCIS investigates the death of a Navy lieutenant whose body was found at a construction site; Ziva thinks about her future.

On Christmas Eve, Walter becomes unconscious after falling down the stairs and enters a dream world where Team Scorpion never existed.

The CSI team must find whoever is trying to kill a couple recently released from jail, whose misdeeds turned them into media darlings.

The crew gets stuck in the office during a Christmas Eve blizzard; Mac investigates charges of abuse; Bud faces a daunting challenge.

Harm and Mac are assigned to prosecute three sailors who are charged with the brutal beating of a man whom they claim raped their shipmate.

The CSI team must find whoever is trying to kill a couple recently released from jail, whose misdeeds turned them into media darlings.

On Christmas Eve, Walter becomes unconscious after falling down the stairs and enters a dream world where Team Scorpion never existed.

Margaret asks Todd for help on a seemingly straightforward wrongful termination case over a dating app, but with Todd's investigation, they quickly realize it's much more complicated; tensions between Margaret and Gus simmer.

Gibbs finally comes face to face with Ari, the Bête Noir terrorist who had wounded him before escaping.

The CSI team must find whoever is trying to kill a couple recently released from jail, whose misdeeds turned them into media darlings.

On Christmas Eve, Walter becomes unconscious after falling down the stairs and enters a dream world where Team Scorpion never existed.

The crew gets stuck in the office during a Christmas Eve blizzard; Mac investigates charges of abuse; Bud faces a daunting challenge.

Harm and Mac are assigned to prosecute three sailors who are charged with the brutal beating of a man whom they claim raped their shipmate.

The team gets a new lead in the mole investigation after an unknown assailant kills two men disguised as sheriff's deputies in front of Callen's home; Nell interviews a prison inmate who has information on the department's leak.

On August 17, 1994, in Kelowna B.C., eight-year-old Mindy Tran hopped on her bike and pedaled over to a nearby friend's house to ask her to play; she was never seen again.

Two Eritrean refugees looking for a better life in Canada are murdered; 55-year-old Nighisti Semret is stabbed walking home from work; The remains of 28-year-old Rigat Ghirmay are discovered by a dog walker in a west-end park.

In 2017, Chinese exchange student Yingying Zhang mysteriously vanishes from the University of Illinois campus; police and the FBI turn to surveillance footage to uncover the shocking and sinister reality.

Fraser offers to help a former Mountie who is on the run when a serial killer he put away escapes from prison.

The trail of bad meat that sickened a child leads Fraser and Ray to horse auctions; guests Kaye Ballard, Richard Moll.

Young professional Sasha Samsudean disappears after a night out in downtown Orlando, Fla.; detectives turn to video surveillance footage to unravel the mystery and bring Sasha's killer to justice.

In 2017, Chinese exchange student Yingying Zhang mysteriously vanishes from the University of Illinois campus; police and the FBI turn to surveillance footage to uncover the shocking and sinister reality.

Bud's first big case involves a Navy SEAL who is being held liable in the deaths of three U.N. peacekeepers.

While searching for Agent Clayton Webb's killer, Harm and Mac stumble upon a rogue government spy agency.

When Margaret finds herself on the verge of losing a prominent case involving the murder of an investigative journalist, Todd seeks help from an unlikely source - his imprisoned ex-girlfriend, Veronica.

Gibbs questions the choices he has made during the course of his life when a man pulls a gun on him at a diner.

The team must work with Toby's nemesis and his wife - Toby's ex-fiancée - when they are locked inside an artificially intelligent doomsday bunker that aims to kill them; Walter is distracted by a dream in which he married Florence instead of Paige.

A kidnapped woman misdials a cell-phone number and begs for help, and the team must figure out the number and person she was trying to call.

Bud's first big case involves a Navy SEAL who is being held liable in the deaths of three U.N. peacekeepers.

While searching for Agent Clayton Webb's killer, Harm and Mac stumble upon a rogue government spy agency.

A kidnapped woman misdials a cell-phone number and begs for help, and the team must figure out the number and person she was trying to call.

The team must work with Toby's nemesis and his wife - Toby's ex-fiancée - when they are locked inside an artificially intelligent doomsday bunker that aims to kill them; Walter is distracted by a dream in which he married Florence instead of Paige.

When Margaret finds herself on the verge of losing a prominent case involving the murder of an investigative journalist, Todd seeks help from an unlikely source - his imprisoned ex-girlfriend, Veronica.

Gibbs and his team face a challenge when the wife and 9-year-old daughter of a Navy captain are kidnapped from their home, and the captain is held hostage in his own office.

A kidnapped woman misdials a cell-phone number and begs for help, and the team must figure out the number and person she was trying to call.

The team must work with Toby's nemesis and his wife - Toby's ex-fiancée - when they are locked inside an artificially intelligent doomsday bunker that aims to kill them; Walter is distracted by a dream in which he married Florence instead of Paige.

Bud's first big case involves a Navy SEAL who is being held liable in the deaths of three U.N. peacekeepers.

While searching for Agent Clayton Webb's killer, Harm and Mac stumble upon a rogue government spy agency.

NCIS looks into the disappearance of a Navy lieutenant commander who is working on foreign cyber threats with the NSA; the team celebrates the holidays.

On September 28, 2011, 19-year-old Maple Batalia, an aspiring model, actress and doctor, is shot and killed in a university campus parking lot; security camera footage pans away at the last moment, leaving her last minutes alive a mystery.

A series of calls to 911 leads first responders to multiple scenes and the disturbing discovery of a young woman's body.

Michele Davis dies after a traffic accident on the interstate near Des Moines, Iowa; surveillance cameras show that what first appeared as an accident could be something more sinister.

Fraser and Ray go under cover to expose a crooked auto dealership selling - then stealing and recycling - used cars.

Fraser and Ray (Paul Gross, David Marciano) help a restaurant owner whose son has been kidnapped by the Chinese mob.

When she interrupts a burglary at home, Diane Pranske is abducted and left for dead across state lines; detectives turn to surveillance video to find her assailant, and investigators try to get justice for this brutal crime.

Michele Davis dies after a traffic accident on the interstate near Des Moines, Iowa; surveillance cameras show that what first appeared as an accident could be something more sinister.

Lt. Curtis Rivers is captured by separatists who threaten to hang him for his apparent part in the death of a 14-year-old boy.

When Harm and Mac investigate an international incident on a nuclear submarine, their relationship is tested by the cramped quarters.

When Margaret's client faces an attempted murder charge, she mounts a creative defense to prove her client's innocence; Todd takes an experimental drug to find evidence; Allison finds herself in trouble and reaches out to Todd for help.

A dead Navy captain dressed in an unusual costume underneath his uniform leads the team to discover a secret society; DiNozzo is forced to work with his ex-fiancee (Perrey Reeves).

Power is knocked out in Los Angeles, and the team must help a teen pilot and his girlfriend who are lost over the Pacific without any radio contact; Walter must look after a group of Ralph's classmates; Cabe tries to tell Allie that he loves her.

The team has a long list of suspects, including a victim's wife, a magician and a captain, as members search for the killer of two people on a cruise ship docked in Miami.

Lt. Curtis Rivers is captured by separatists who threaten to hang him for his apparent part in the death of a 14-year-old boy.