Two years after defeating Morgan, visitors from the future send the Runaways back through time to prevent their own murders and even save a friend thought lost forever.

Monk is on the trail of a man who seems to have committed the perfect crime when he murdered his wife and an intruder, and Natalie worries that Julie's new relationship is progressing too fast.

The squad is on high alert after an apparent threat is made on Riggs' life. With Murtaugh taking on more responsibility at work, he and Riggs have to deal with their changing relationship. Meanwhile, Trish gets caught up in some trouble and Molly asks Riggs to make a big decision about their future. Riggs works on family issues.

When they are given the Social Security number of a teenager who was killed two years ago, Reese and Finch begin to question the infallibility of The Machine. Meanwhile, Finch flashes back to The Machine's origin and how it was developed.

A former teen actor is murdered while working on his big comeback movie, and things become awkward between Raydor and Flynn when Flynn's daughter comes for a visit.

When Voight witnesses the kidnapping of a woman who's somehow connected to his past, Intelligence searches for a connection between the kidnapping and bank robberies.

Zoe gets Dr. Lightman's help in a case involving an African-American college athlete accused of statutory rape, and Dr. Foster tries to help a sympathetic mother while investigating a religious leader for the IRS.

Mystery novelist found dead in locked panic room with no gun. Private eyes Fergus and Harry investigate the peculiar case while fending off the meddlesome Harry Benedict.

When they are given the Social Security number of a teenager who was killed two years ago, Reese and Finch begin to question the infallibility of The Machine. Meanwhile, Finch flashes back to The Machine's origin and how it was developed.

Monk is on the trail of a man who seems to have committed the perfect crime when he murdered his wife and an intruder, and Natalie worries that Julie's new relationship is progressing too fast.

When Voight witnesses the kidnapping of a woman who's somehow connected to his past, Intelligence searches for a connection between the kidnapping and bank robberies.

Zoe gets Dr. Lightman's help in a case involving an African-American college athlete accused of statutory rape, and Dr. Foster tries to help a sympathetic mother while investigating a religious leader for the IRS.

The squad is on high alert after an apparent threat is made on Riggs' life. With Murtaugh taking on more responsibility at work, he and Riggs have to deal with their changing relationship. Meanwhile, Trish gets caught up in some trouble and Molly asks Riggs to make a big decision about their future. Riggs works on family issues.

A group of six Los Angeles teens, fractured by a tragic loss, reunite only to discover that their parents may be hiding a terrible secret that turns their world upside down.

The Vibrant Villages competition is fierce, with dirty tricks and sabotage galore. So when Harry's friend Evelyn Summers finds dead fish in her pond, she assumes it's more of the same-until she finds the corpse of her estranged husband.

Monk, in competition with one of Dr. Kroger's other patients, gets conned into helping Kroger's son find buried treasure. The problem is that the treasure is linked to a recent bank robbery and murder.

When a gang member is killed a few hours after being found not guilty in a murder trial, a gang war threatens to ensue. The accused killer, a rival gang member, is represented by Sharon's ex-husband Jackson.

While on vacation in Mexico, Lightman and Emily become involved in the case of a missing American woman. Back home, Foster investigates tainted blood in D.C.-area hospitals with Lightman's rival, Jack Rader.

When the Machine directs Reese and Finch to a former soldier with shady connections to a crime ring, Reese must infiltrate the gang, taking part in their heist. Meanwhile, Detective Carter's closer than ever to finding out who Reese is.

Former international CIA operative Wesley Cole returns home and becomes Murtaugh's partner on the force; Avery continues his campaign for city council.

Halstead and Atwater go undercover to prevent military-grade weapons from hitting the street. Meanwhile, Voight calls in a favor as a last-ditch effort to clear Olinsky's name for Bingham's murder.

Holder and Sarah get a break in the case; Seward clashes with death; Bullet becomes a protector.

When a gang member is killed a few hours after being found not guilty in a murder trial, a gang war threatens to ensue. The accused killer, a rival gang member, is represented by Sharon's ex-husband Jackson.

When the Machine directs Reese and Finch to a former soldier with shady connections to a crime ring, Reese must infiltrate the gang, taking part in their heist. Meanwhile, Detective Carter's closer than ever to finding out who Reese is.

While on vacation in Mexico, Lightman and Emily become involved in the case of a missing American woman. Back home, Foster investigates tainted blood in D.C.-area hospitals with Lightman's rival, Jack Rader.

Former international CIA operative Wesley Cole returns home and becomes Murtaugh's partner on the force; Avery continues his campaign for city council.