After receiving valuable information from Agent Jenna Kaye, the team closes in on Wo Fat; Danny is exposed to a deadly neurological agent.

An investigation into the bizarre death of a Marine and two friends seems linked to Gibbs' past.

Horatio delves into the world of modern treasure-hunting after a victim is found skewered to his yacht with a harpoon.

With Mandy alone at the helm, an accident threatens the Northwestern crew; Josh changes course on the Cornelia while Casey sleeps; Harley's launcher snaps at the worst possible moment; a short circuit cuts power to the Wizard's forward lights.

Harm and Bud face a drug lord who seems to hold the upper hand when an unauthorized U.S.-Colombian mission goes wrong, supposedly resulting in the death of a Marine.

Harm goes under cover to help Mac investigate a Marine captain who risks the lives of his men in training exercises as preparation for real combat.

A case involving the murder of a drug dealer turns personal for Special Agent Sam Hanna when he discovers his former Navy Seal comrades are involved.

Crime reporter Nancy Hixt reviews the case of Meika Jordan, a six-year-old girl whose life was tragically cut short; Nancy reveals the details of this case and the evidence uncovered by investigators in their quest for justice.

Dismembered remains belonging to a child are uncovered, and Alan Carter returns to the scene of the crime 20 years later, reuniting with the lead detective and a community coming together in grief.

In Groton, Vermont, a young man with a developmental disability leaves work and is never seen again; with no leads in sight, investigators must rely on surveillance footage to piece together the truth behind Christopher Gray's disappearance.

Ray becomes jealous when Fraser gets all the media attention during a terrorist's trial, but both lawmen take center stage after they are held as hostages.

Fraser develops amnesia when he is thrown from the back of a speeding van; Ray struggles to help his partner regain his memory.

Detectives rely on surveillance footage at a hospital in Tyler, Texas, when patients mysteriously start dying in the intensive care unit.

In Groton, Vermont, a young man with a developmental disability leaves work and is never seen again; with no leads in sight, investigators must rely on surveillance footage to piece together the truth behind Christopher Gray's disappearance.

Harm and Mac defend a former Navy SEAL accused of using excessive force in the killing of three men robbing a convenience store.

Although hobbled by a knee injury, Harm must take on Islamic terrorists who have taken over a hospital to seize an Israeli diplomat.

The Five-0 is targeted by Wo Fat after getting too close to the truth about the criminal mastermind and his associates.

The team takes a second look into a lieutenant's death after the blogger who accused them of a cover-up turns up dead.

After failing a military training mission, the team members are determined to prove themselves when an Internet infrastructure is threatened by a bomber.

The team responds after a gifted 14-year-old tennis player is kidnapped from her bedroom in the middle of the night.

Harm and Mac defend a former Navy SEAL accused of using excessive force in the killing of three men robbing a convenience store.

Although hobbled by a knee injury, Harm must take on Islamic terrorists who have taken over a hospital to seize an Israeli diplomat.

The team responds after a gifted 14-year-old tennis player is kidnapped from her bedroom in the middle of the night.

After failing a military training mission, the team members are determined to prove themselves when an Internet infrastructure is threatened by a bomber.

The Five-0 is targeted by Wo Fat after getting too close to the truth about the criminal mastermind and his associates.

When a naval commander is murdered, an old friend contacts Gibbs; his friend, now a senator, believes he's being framed because of his connection with the commander.

The team responds after a gifted 14-year-old tennis player is kidnapped from her bedroom in the middle of the night.

After failing a military training mission, the team members are determined to prove themselves when an Internet infrastructure is threatened by a bomber.

Harm and Mac defend a former Navy SEAL accused of using excessive force in the killing of three men robbing a convenience store.

Although hobbled by a knee injury, Harm must take on Islamic terrorists who have taken over a hospital to seize an Israeli diplomat.

Following a murder, the secrets to classified software are thought to be lost until NCIS uncovers a suspect from Vance's past.

After a year studying abroad, Lukas Strasser-Hird had dreams to be a doctor; he went out with friends to celebrate when he arrived home, but no one could have predicted how dangerous the situation was to become.

Coaxed from her home for a photoshoot, a promising young athlete never returns: Caryn Lieberman brings us through the DNA breakthrough that cracks the case to a mother's national safety campaign.

In Texas, on Christmas Eve 2010, a woman gets a mysterious phone call at work and speeds home to find her 12-year-old son gone without a trace; investigators look at those closest to the boy, but only surveillance footage can lead them to the truth.

Fraser returns from vacation to a blazing apartment and a new partner, Stanley Ray Kowalski.

Fraser helps Kowalski confront a demon from his past; Internal Affairs investigates the detective division.

In 2017, a neighbor finds the body of 40-year-old Dawn Meade outside an apartment complex in Louisa, Va.; detectives must determine if this is an accidental death or something more sinister, so they turn to surveillance footage to uncover the truth.

In Texas, on Christmas Eve 2010, a woman gets a mysterious phone call at work and speeds home to find her 12-year-old son gone without a trace; investigators look at those closest to the boy, but only surveillance footage can lead them to the truth.

Ukrainian Correspondent Nadia Petryk compares Cowboys and Cossacks.

Harm and Mac face off both in and out of the courtroom when Mac is forced to defend an admitted wife-beater now being prosecuted for murder.

While McGarrett awaits trial for the murder of the governor, he receives an unexpected visit; Kono is suspended.

When a murder investigation leads the team to Gibbs' hometown, secrets about his past are revealed.

The members of the team disregard Cabe's advice and go to Las Vegas for a casino job; a robbery leads to Walter being arrested.

The team finds a rape victim clinging to life after being beaten, and Horatio suspects an imprisoned rapist is somehow responsible for the attack.

Ukrainian Correspondent Nadia Petryk compares Cowboys and Cossacks.

Harm and Mac face off both in and out of the courtroom when Mac is forced to defend an admitted wife-beater now being prosecuted for murder.

The team finds a rape victim clinging to life after being beaten, and Horatio suspects an imprisoned rapist is somehow responsible for the attack.

The members of the team disregard Cabe's advice and go to Las Vegas for a casino job; a robbery leads to Walter being arrested.

While McGarrett awaits trial for the murder of the governor, he receives an unexpected visit; Kono is suspended.

When a Marine's body surfaces halfway around the world, the investigation forces Ziva to dig up a lost chapter of her life.

The team finds a rape victim clinging to life after being beaten, and Horatio suspects an imprisoned rapist is somehow responsible for the attack.

The members of the team disregard Cabe's advice and go to Las Vegas for a casino job; a robbery leads to Walter being arrested.

Ukrainian Correspondent Nadia Petryk compares Cowboys and Cossacks.

Harm and Mac face off both in and out of the courtroom when Mac is forced to defend an admitted wife-beater now being prosecuted for murder.

The team is assigned to track down a missing unmanned aerial vehicle (UAV) after it is compromised during a training exercise, killing a Marine before it disappears.

Alicia's disappearance leads to one of the largest missing person searches in Ontario's history; reporter Catherine McDonald reconnects with Alicia's mother to tell the tale.

A small community in the Rocky Mountains is shattered when two people are found dead and a two-year old goes missing; Nancy Hixt recounts one of the most disturbing cases she's covered.

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 Kowalski try to thank a man for saving a boy's life and inadvertently reveal his identity as a federal witness.

Fraser and Kowalski protect Kowalski's ex-wife and her new boyfriend, a politician who has been receiving death threats.

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 decommissioned aircraft carrier has a skeleton aboard, along with evidence that Harm's MIA father may be alive in Russia.

A fighter pilot facing charges of adultery lies to Harm, shooting a hole in his defense and shocking her most staunch advocate.

Lori Weston, an officer with excellent profiling skills, joins the Five-0 to ensure McGarrett and the team follow new rules set in place by Gov. Denning; a teenage paddleboard champion is abducted.

When a Marine known for his love of practical jokes is found dead on Halloween, the team is called in to investigate; they soon learn that his jokes may have been the reason why he was killed.

Walter and the team ask a troubled former associate for help when a nuclear reactor in Los Angeles is on the verge of a cataclysmic meltdown.

A masked gunman opens fire at a bar, leaving its two owners dead and a third man wounded. Jay Mohr and John Heard guest star.

A decommissioned aircraft carrier has a skeleton aboard, along with evidence that Harm's MIA father may be alive in Russia.

A fighter pilot facing charges of adultery lies to Harm, shooting a hole in his defense and shocking her most staunch advocate.

A masked gunman opens fire at a bar, leaving its two owners dead and a third man wounded. Jay Mohr and John Heard guest star.

Walter and the team ask a troubled former associate for help when a nuclear reactor in Los Angeles is on the verge of a cataclysmic meltdown.

Lori Weston, an officer with excellent profiling skills, joins the Five-0 to ensure McGarrett and the team follow new rules set in place by Gov. Denning; a teenage paddleboard champion is abducted.

Gibbs' hunt for the killer of a marine puts him on a collision course with an old friend.

A masked gunman opens fire at a bar, leaving its two owners dead and a third man wounded. Jay Mohr and John Heard guest star.

Walter and the team ask a troubled former associate for help when a nuclear reactor in Los Angeles is on the verge of a cataclysmic meltdown.

A decommissioned aircraft carrier has a skeleton aboard, along with evidence that Harm's MIA father may be alive in Russia.

A fighter pilot facing charges of adultery lies to Harm, shooting a hole in his defense and shocking her most staunch advocate.

When an Iraqi businessman is murdered, the team searches for the former Marine who was hired to protect him.

In May of 2007, 15 year old Jordan Manners was gunned down in a hallway, marking the first time a student was shot and killed inside a Toronto school and Catherine McDonald remembers the murder, its impact on the community and his family.

At 29 years old, Lisa Mitchell and her common-law husband, Allan, had two children and she juggled two jobs to try to make ends meet and then one day, she disappeared, leaving her common-law husband and two children behind.

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.

Kowalski and Fraser begin an investigation that reveals the dark side of boxing after one of Kowalski's students injures someone in the ring.

While the police force is on strike, Fraser and Kowalski help a bounty hunter find a bail jumper from Montana.

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 and Mac must prosecute a Marine colonel who defied orders in order to rescue his men from a Haitian warlord.

Joe Francis seizes an opportunity to build a new kind of porn company; it quickly becomes a runaway hit and makes Francis a celebrity, but behind the success are questionable business practices and lasting impacts for the women involved.

Legal troubles mount as shocking testimonies from underage girls land Francis in the crosshairs of Panama City Beach authorities, but Francis is adamant that he is the actual victim.

Despite mounting legal issues and a new threat from free internet porn, Francis and his empire seem unstoppable, even as his own increasingly unhinged and violent behavior threatens its growth.

The CSI team investigates when three people are found dead after a hurricane strikes Miami; Calleigh finds a woman shot to death in a house that was recently looted.

Harm and Mac must prosecute a Marine colonel who defied orders in order to rescue his men from a Haitian warlord.

Harm must choose between duty and loyalty when he learns that his mentor has been falsifying medical records to remain a Navy pilot.

The CSI team investigates when three people are found dead after a hurricane strikes Miami; Calleigh finds a woman shot to death in a house that was recently looted.

Joe Francis seizes an opportunity to build a new kind of porn company; it quickly becomes a runaway hit and makes Francis a celebrity, but behind the success are questionable business practices and lasting impacts for the women involved.

Legal troubles mount as shocking testimonies from underage girls land Francis in the crosshairs of Panama City Beach authorities, but Francis is adamant that he is the actual victim.

Despite mounting legal issues and a new threat from free internet porn, Francis and his empire seem unstoppable, even as his own increasingly unhinged and violent behavior threatens its growth.

Joe Francis seizes an opportunity to build a new kind of porn company; it quickly becomes a runaway hit and makes Francis a celebrity, but behind the success are questionable business practices and lasting impacts for the women involved.

Legal troubles mount as shocking testimonies from underage girls land Francis in the crosshairs of Panama City Beach authorities, but Francis is adamant that he is the actual victim.

Despite mounting legal issues and a new threat from free internet porn, Francis and his empire seem unstoppable, even as his own increasingly unhinged and violent behavior threatens its growth.

Teenage sisters Marsha and Tamara Ottey were stabbed to death in August 1995; months later, Dimitrija Trajceski became the first TTC worker killed on the job; Caryn Lieberman shares the story of how these two families' lives became intertwined.

Kimberlee hasn't been heard from since 2016; her partner says she left and abandoned the family and her parents accuse him of murder; Rumina Daya investigates this unsolved case that's testing the limits of international justice.

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.

Kowalski, Welsh and Thatcher (Callum Keith Rennie, Beau Starr, Camilla Scott) all witness a murder at the mall, but can't agree on who did it.

When Fraser's friend intercepts a secret message, Fraser and Kowalski become entrapped in a deadly arms transaction.

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.

A Vietnam veteran with disabilities faces murder charges and weaves a complex tale of a crime that began more than 30 years ago in a POW camp.

LAPD ground units work with helicopter officers to catch an alleged multiple-hit-and-run suspect; deputies and police in Florida chase an alleged murder suspect; deputies in New Mexico pursue a naked woman driving recklessly on the highway.

Officers in Florida pursue a man who stole two police cars in the same day; deputies engage in a foot chase with an alleged cop killer; police respond to a report of a man attacked with a machete.

A man wanted for robbery and carjacking leads sheriff's deputies on a chase through crowded city streets; police get in a foot chase with an attempted murder suspect; a late-night, 145-mile-an-hour highway pursuit; and more.

The pursuit of a convicted felon ends with a head-on collision with a police cruiser; a shoplifting suspect shoots at police and then sets his own house on fire during a standoff; air and ground units coordinate during a high-speed chase.

A gas man is engulfed in invisible flames and dies during a qualifying race at the Grand Prix Americas.

A Vietnam veteran with disabilities faces murder charges and weaves a complex tale of a crime that began more than 30 years ago in a POW camp.

An investigation into the disappearance of a Navy plane leads Harm, Mac and Bud to consider several unusual possibilities until they uncover a terrorist plot.

A gas man is engulfed in invisible flames and dies during a qualifying race at the Grand Prix Americas.

LAPD ground units work with helicopter officers to catch an alleged multiple-hit-and-run suspect; deputies and police in Florida chase an alleged murder suspect; deputies in New Mexico pursue a naked woman driving recklessly on the highway.

Officers in Florida pursue a man who stole two police cars in the same day; deputies engage in a foot chase with an alleged cop killer; police respond to a report of a man attacked with a machete.

A man wanted for robbery and carjacking leads sheriff's deputies on a chase through crowded city streets; police get in a foot chase with an attempted murder suspect; a late-night, 145-mile-an-hour highway pursuit; and more.

The pursuit of a convicted felon ends with a head-on collision with a police cruiser; a shoplifting suspect shoots at police and then sets his own house on fire during a standoff; air and ground units coordinate during a high-speed chase.

LAPD ground units work with helicopter officers to catch an alleged multiple-hit-and-run suspect; deputies and police in Florida chase an alleged murder suspect; deputies in New Mexico pursue a naked woman driving recklessly on the highway.

Officers in Florida pursue a man who stole two police cars in the same day; deputies engage in a foot chase with an alleged cop killer; police respond to a report of a man attacked with a machete.

A man wanted for robbery and carjacking leads sheriff's deputies on a chase through crowded city streets; police get in a foot chase with an attempted murder suspect; a late-night, 145-mile-an-hour highway pursuit; and more.

The pursuit of a convicted felon ends with a head-on collision with a police cruiser; a shoplifting suspect shoots at police and then sets his own house on fire during a standoff; air and ground units coordinate during a high-speed chase.

An accomplished dancer, an aspiring urban planner, two talented musicians, and a young man who was well on his way to becoming a humanitarian became victims of the biggest mass killing in Calgary's history.

What started out as a party to mark the end of classes at the University of Calgary ended in a horrific tragedy; to add to the complexity of the case, investigators quickly learned the suspect was the son of one of their own.

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.

During a night of full-moon madness, Ray punches a hole in the interrogation room wall and finds a perfectly preserved corpse.

Fraser must find a flight attendant's killer before her RCMP father starts an international incident.

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.

Harm, Mac and Bud believe that an apparent bungling by the Navy in the downing of a North Korean airliner was a plot to make the United States look bad.

When Harm, Mac and Bud investigate a Medal of Honor candidate, they find a man very different from his public persona.

Joe White, McGarrett's mentor, asks the team to investigate the death of a Navy SEAL, which was previously ruled a suicide; Chin Ho is concerned when Kono starts fraternizing with a group of dirty ex-cops.

A murderous psychopath taunts the team by leaving clues to the next victim's identity during the week of Halloween.

After being accused of destroying a priceless piece of art, the team must pass a mandated psych evaluation; Paige asks the team for help when Ralph is hesitant to go to the school Halloween party.

Horatio must find his brother's killer and protect a niece he never knew existed; the team explores voyeuristic Internet sites in connection with a stockbroker's murder.

Harm, Mac and Bud believe that an apparent bungling by the Navy in the downing of a North Korean airliner was a plot to make the United States look bad.

When Harm, Mac and Bud investigate a Medal of Honor candidate, they find a man very different from his public persona.

Horatio must find his brother's killer and protect a niece he never knew existed; the team explores voyeuristic Internet sites in connection with a stockbroker's murder.

After being accused of destroying a priceless piece of art, the team must pass a mandated psych evaluation; Paige asks the team for help when Ralph is hesitant to go to the school Halloween party.

Joe White, McGarrett's mentor, asks the team to investigate the death of a Navy SEAL, which was previously ruled a suicide; Chin Ho is concerned when Kono starts fraternizing with a group of dirty ex-cops.

Two mercenaries are found dead on Gibbs' boat; Gibbs must consider his former mentor in a new light.

Horatio must find his brother's killer and protect a niece he never knew existed; the team explores voyeuristic Internet sites in connection with a stockbroker's murder.

After being accused of destroying a priceless piece of art, the team must pass a mandated psych evaluation; Paige asks the team for help when Ralph is hesitant to go to the school Halloween party.

Harm, Mac and Bud believe that an apparent bungling by the Navy in the downing of a North Korean airliner was a plot to make the United States look bad.

When Harm, Mac and Bud investigate a Medal of Honor candidate, they find a man very different from his public persona.

The NCIS team must find a motive when they discover the body of a Marine who had been living a double life as a wealthy bachelor.

In 1981, Kelly Cook took a job to babysit for someone named Bill Christensen; the 15-year old girl was never seen alive again; featuring an exclusive interview with the original target of Bill Christensen.

New leads in the 10 year old case of a 42-year-old nurse brutally murdered in her home; her family questions why it is taking so long to make an arrest.

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.

After Kowalski is framed for the murder of a crime boss, Fraser places him under arrest at the Canadian consulate.

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.

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.

Harm risks his career when he uncovers information linking a pilot's death to a classified military aircraft the government wants to keep secret at all costs.

Harm becomes the pawn of a CIA agent hoping to catch the killer of a Russian spy known for dealing in stolen secrets.

The team investigates the murder of a deep-sea diver famous for the valuable treasure he finds.

The team helps Vance face his demons while uncovering a complex relationship with a killer that endangers his family.

Three convicts - including a brilliant hacker - escape from prison; Paige tries to manage Ralph's expectations when his dad returns.