Jack and his squad search for a driven neurosurgeon, who disappeared after a nighttime jog in the city with her ex-husband, Dr. Evan Mayhew.

When Luke disappears after an uplifting speech at his high school reunion, Jack and the team find Luke's blood at the location of his disappearance.

Officer Cooper clashes with his new "boot" -- Gary Steele, while Lydia Adams tries to balance detective work with motherhood.

Provenza finds himself in an embarrassing situation.

Desperate to get her daughter back, Tasha will do anything to get to the truth, even if that means accepting an offer of help from an unlikely source in Jen. As they track down Jack, the reality of Tasha's marriage is finally exposed.

When Wesley Cole returns home and assumes duty as a LAPD police officer, the former international CIA operative finds himself navigating a new partnership with Murtaugh as he adjusts to life in Los Angeles. Meanwhile, Avery continues his campaign for city council.

When Dr. Alicia Seberg, a government research scientist, is exposed to a deadly toxin while at work and has only hours to live, she calls Patrick Jane and the CBI to find her murderer.

Officer Cooper clashes with his new "boot" -- Gary Steele, while Lydia Adams tries to balance detective work with motherhood.

Goodwin’s troubles persist. Charles clashes with his former resident over a depressed patient. Lenox and Ripley treat a car accident victim who recently reunited with his college sweetheart.

Provenza finds himself in an embarrassing situation.

When Wesley Cole returns home and assumes duty as a LAPD police officer, the former international CIA operative finds himself navigating a new partnership with Murtaugh as he adjusts to life in Los Angeles. Meanwhile, Avery continues his campaign for city council.

When Dr. Alicia Seberg, a government research scientist, is exposed to a deadly toxin while at work and has only hours to live, she calls Patrick Jane and the CBI to find her murderer.

Officer Cooper clashes with his new "boot" -- Gary Steele, while Lydia Adams tries to balance detective work with motherhood.

Jack and the team search for a dedicated and respected firefighter who disappeared after rescuing two fellow firemen from a building engulfed in flames.

Jack and his squad search for a driven neurosurgeon, who disappeared after a nighttime jog in the city with her ex-husband, Dr. Evan Mayhew.

When Luke disappears after an uplifting speech at his high school reunion, Jack and the team find Luke's blood at the location of his disappearance.

Provenza finds himself in an embarrassing situation.

Goodwin’s troubles persist. Charles clashes with his former resident over a depressed patient. Lenox and Ripley treat a car accident victim who recently reunited with his college sweetheart.

When Wesley Cole returns home and assumes duty as a LAPD police officer, the former international CIA operative finds himself navigating a new partnership with Murtaugh as he adjusts to life in Los Angeles. Meanwhile, Avery continues his campaign for city council.

When Dr. Alicia Seberg, a government research scientist, is exposed to a deadly toxin while at work and has only hours to live, she calls Patrick Jane and the CBI to find her murderer.

Officer Cooper clashes with his new "boot" -- Gary Steele, while Lydia Adams tries to balance detective work with motherhood.

Det. Mendoza asks the team to probe murders.

When tragedy strikes the family of a prominent judge, Brady must determine if the murder is connected to any of her rulings. Baxter steps in when a key witness refuses to testify. Maroun tries to protect another witness's privacy.

After a narcotics officer is shot in the back, Brady returns to her old precinct to investigate the murder; when the suspect's story doesn't add up, she enlists Shaw and Riley to discover the truth.

Alec Mercer, a world-renowned professor of behavioral science, lends his expertise to an array of high-stakes cases with his unique and unexpected approach to understanding human behavior.

As the mystery surrounding Joy’s disappearance deepens, Amy gathers the community together in the hopes of bringing her mother home.