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While investigating the death of an intruder at Quantico, Jimmy and Kasie are exposed to a deadly biotoxin, and the NCIS team calls on Doctor Carol Wilson for help as they race to find the antidote. (Repeat).

As NCIS investigates the cause of death of a reservist Navy Seal surgeon, they're forced to bring Vance's daughter, Kayla, who recently trained with NCIS, to help with a highly dangerous mission. (Repeat).

The NCIS team must help Torres when he puts his future at stake by confronting the man who tormented his family when he was a child. (Repeat).

As NCIS mourns the loss of Ducky, the agents find comfort in working on one of his unfinished cases involving a woman whose father was dishonorably discharged from the Marines. (Repeat).

Parker's delinquent past resurfaces when NCIS is called to Philadelphia to investigate the death of a Navy petty officer. (Repeat).

A gruesome mishap at a Navy petty officer's gender-reveal party leads NCIS to the case of a missing teacher that was popularized on a true crime podcast. (Repeat).

NCIS investigates the apparent suicide of a retired Navy officer who was in Palmer and Knight's grief group. Also, Torres gets a call from NCIS Special Agent Jane Tennant to come to Hawai'i when she gets a lead on a witness from a case they worked on together. (Repeat).

When an infamous arms dealer, Reymundo Diaz, is released from prison and bodies start piling up, Torres is forced to face the repercussions of his actions during an undercover operation he worked on years ago. (Repeat).

A weekly series in which the host reads scripture passages.

Bull takes a frustratingly passive role in court during a medical malpractice suit, when he helps the surgeon who saved his life after his heart attack and must defer to her browbeating attorney on trial strategy. (Repeat).

Bull and Izzy experience marital discord when Bull has TAC lead the defense for Diana Lindsay, his ex-girlfriend who's accused of killing her lover's wife. Also, personal conflicts abound for the TAC team when Chunk finds himself defending Diana in court against his boyfriend and prosecutor, Robert. (Repeat).

Izzy hires Bull and TAC to defend a jockey accused of committing arson against a stable owner who fired him. (Repeat).

Bull puts aside his personal grievances to help AUSA Reilly, who prosecuted him for jury tampering, bring one of the world's most dangerous drug lords to justice. As the pair enter into a hesitant partnership, Bull's unconventional style clashes with the lawyer's commitment to working by the book. (Repeat).

When Bull is sidelined with a back injury, Chunk and Marissa are forced to go to court without him to defend Kyla. (Repeat).

Season 9 begins with the BAU searching for a methodical killer in Arizona. Meanwhile, the team speculate that Hotch wants to be the new unit chief. (Repeat).

A bizarre familial connection leads the BAU to zero in on a suspect in the ritualistic murders they have been investigating in Arizona. (Repeat).

A sniper terrorizes Dallas and the BAU must determine if the upcoming 50th anniversary of the Kennedy assassination is a motivating factor in the shootings. (Repeat).

The new BAU section chief arrives, and he shares a long work history with J.J. Meanwhile, an UnSub terrorizes Baltimore and leaves his victims unable to communicate. (Repeat).

Hotch fights for his life due to complications from being stabbed by the Reaper, and experiences visions of his late wife and his nemesis Foyet. Meanwhile, the BAU searches for a missing teen and investigates her estranged father as a suspect in her disappearance. (Repeat).

The BAU investigates ritualistic murders in Utah. The probe reveals the killer may have a fascination with the Salem witch trials. Meanwhile, Garcia prepares for a Day of the Dead celebration. (Repeat).

Strangulations in Boston are investigated and the probe reveals that the killer likes to keep mementos of his victims. Meanwhile, the unit rallies around Rossi when his favorite bar is on the verge of closing. (Repeat).

Teenagers reported missing in Chicago commit a series of mass murders. Meanwhile, Morgan is conflicted when his girlfriend takes her job at a hospital as seriously as he takes his work. (Repeat).

An alt-right provocateur is murdered after giving a speech at a university in New York City. Maggie and OA investigate the school's more extreme political groups and rely on OA's sister, Amira, a student, for help. (Repeat).

When a federal judge is executed in broad daylight, the squad is tasked with tracking down a suspect with ties to a local Islamic center. Maggie also reunites with a former coworker, while OA's relationship with his girlfriend Gemma deteriorates following her friend's death. (Repeat).

When the director of a Brooklyn migrant center is abducted and held hostage along with his wife, the team must work quickly to meet the demands of their kidnapper. (Repeat).

Multiple people are targeted and killed with a poisonous gas in broad daylight. The team races to find the killer, who they believe is tied to an eco-terrorist plot. Meanwhile, Maggie continues to explore motherhood. (Repeat).

When a bus explosion kills several innocent people, the team jumps into action to take down the responsible terrorist organization. Meanwhile, Scola tries to balance fatherhood with the job. (Repeat).

The team races to find the killer and the missing woman after the president of the NY Fed is gunned down trying to help a young woman in peril. Additionally, a distressing connection to one of Jubal's past cases is revealed during the investigation, compounding the pressure on him as he also deals with his son's school suspension. (Repeat).

When a local club owner is found dead, the team works quickly to find the motive behind the murder of a seemingly innocent man. Meanwhile, OA is smitten with a new love interest but is concerned that she's mixed up with the wrong crowd. (Repeat).

A weekly series in which the host reads scripture passages.

Callen questions Hetty's motives when the team is assigned a missing person's case that involves an undercover agent from her past. (Repeat).

Deeks goes undercover to obtain information on a former arms dealer who is seeking to get back in business. In the process, Deeks befriends a female source who takes the investigation in a dangerous direction. Meanwhile, Kensi runs surveillance on Deeks and the woman, and confronts some difficult emotions that surface. (Repeat).

The fourth season ends with a nuclear explosion in the Pacific. The event reignites a search for stolen nuclear weapons, and leads Hetty to shuffle partnerships. She sends Callen and Kensi overseas and leaves Sam and Deeks as a stateside team. (Repeat).

Season 5 begins with the team searching for stolen nuclear weapons. Meanwhile, Sam and Deeks are hospitalized after being tortured. (Repeat).

Hetty calls upon operational psychologist Nate Getz to help Sam and Deeks cope with their traumatic experience. Meanwhile, a retired Navy admiral and a controversial journalist are murdered aboard a private jet. (Repeat).

Chief Boden and the squad prepare to fight the decision to close Firehouse 51. Meanwhile, danger looms as the team responds to an emergency call at an apartment building; Dawson receives major news; and union president Greg Sullivan makes headlines. (Repeat).

Lt. Casey returns to work; Shay meets her new partner; Dawson begins training at the Chicago Fire Academy; Lt. Severide prepares for his instructor assignment; Clarke refuses to talk to the police; and Molly's future looks bleak. (Repeat).

Casey tries to convince everyone—including himself—that he's fully recovered from his traumatic accident, despite evidence to the contrary. Meanwhile, Shay avoids a lawyer who wants to talk to her about Daryl's suicide; Otis and Katie bond; Boden helps a woman deal with her irresponsible landlord; and Dawson notices something interesting about recruit Rebecca Jones. (Repeat).

The members of Firehouse 51 help out the community after a power outage leaves the neighborhood in darkness on a cold evening. Meanwhile, romances and tempers intensify among the firefighters left at the station during the blackout; Casey continues to hide his condition; and Molly's stakeholders argue about the bar's direction. (Repeat).

Severide feels left out during the search for his missing sister. Meanwhile, Shay gets a surprising tip; Casey gleans new information about his head injury; and Dawson trains for the physical test at the Academy. Chicago Blackhawk players Brent Seabrook and Duncan Keith appear as themselves. (Repeat).

Severide grows frustrated when Vince Keeler goes free, but he maintains hope that justice will prevail. Meanwhile, the firefighters work to rescue a girl trapped inside a donation bin; Mouch learns not to cross Boden's secretary; and the squad responds to a high-rise fire in a downtown office building. (Repeat).

Det. Lindsay narrows down potential suspects in Keeler's disappearance, and Severide's motives place him at the top of her list. Elsewhere, Jones' disruptions are noticed by headquarters; and Hermann and his wife celebrate their 20th anniversary, but his idea for a gift may be ill-advised. (Repeat).

Severide feels moved to help the victim of a car accident because the man reminds him of his own past. Meanwhile, Casey and Boden wonder how they should dock Jones; Mouch and Dawson each deal with opposite-sex problems; and a heroic action has consequences for the squad. (Repeat).