It's dispatcher Marra Wargo's first week in her new position as Supervisor. Despite handling lifelong anxiety, she leads the team through a storm of emergencies, panicked witnesses, and a dog in danger.

Jack and the team try to find Eric Miller, a 12-year-old, who was last seen in the boys' bathroom at his school.

Four years ago, a young woman, Jessica Raab, went missing. Vivian's weekly fingerprint search on the unidentified print found on Jessica's door finally results in a match.

John and Lucero settle into their new friendship during a day filled with strange calls. While Ben and Sammy respond to an insane bank robbery call.

A bank robbery leaves a lot of unanswered questions.

Cole juggles the realities of his job and his duty to be a good parent as he and Murtaugh work together to bust a gang running a lottery scam. Murtaugh prepares to celebrate his 30th year with the LAPD and receives a surprise visit from his competitive father-in-law.

Cole reflects upon his time working for the CIA, as a person from the past makes a startling reappearance. Murtaugh struggles with his own mistakes after a murder raises questions about a suspect he put away years prior; and Leo Getz returns as the attorney on the case.

When Patrick Jane's sneaky conduct causes the case of a confessed hitman to be tossed out of court, his annoyed CBI team must start the investigation over from scratch.

John and Lucero settle into their new friendship during a day filled with strange calls. While Ben and Sammy respond to an insane bank robbery call.

911 Dispatcher Abby Encarnacion is pregnant with her first child and must navigate working 12-hour shifts, taking highly emotional calls, and instructing CPR to a mother who discovers her son is unresponsive.

It's dispatcher Marra Wargo's first week in her new position as Supervisor. Despite handling lifelong anxiety, she leads the team through a storm of emergencies, panicked witnesses, and a dog in danger.

A bank robbery leaves a lot of unanswered questions.

Cole reflects upon his time working for the CIA, as a person from the past makes a startling reappearance. Murtaugh struggles with his own mistakes after a murder raises questions about a suspect he put away years prior; and Leo Getz returns as the attorney on the case.

When Patrick Jane's sneaky conduct causes the case of a confessed hitman to be tossed out of court, his annoyed CBI team must start the investigation over from scratch.

John and Lucero settle into their new friendship during a day filled with strange calls. While Ben and Sammy respond to an insane bank robbery call.

Jesse Prince, a female ex-cop turned bounty hunter, vanishes after being shot at in front of a fugitive's home.

Jack and the team try to find Eric Miller, a 12-year-old, who was last seen in the boys' bathroom at his school.

Four years ago, a young woman, Jessica Raab, went missing. Vivian's weekly fingerprint search on the unidentified print found on Jessica's door finally results in a match.

A bank robbery leaves a lot of unanswered questions.

Cole juggles the realities of his job and his duty to be a good parent as he and Murtaugh work together to bust a gang running a lottery scam. Murtaugh prepares to celebrate his 30th year with the LAPD and receives a surprise visit from his competitive father-in-law.

Cole reflects upon his time working for the CIA, as a person from the past makes a startling reappearance. Murtaugh struggles with his own mistakes after a murder raises questions about a suspect he put away years prior; and Leo Getz returns as the attorney on the case.

When Patrick Jane's sneaky conduct causes the case of a confessed hitman to be tossed out of court, his annoyed CBI team must start the investigation over from scratch.

John and Lucero settle into their new friendship during a day filled with strange calls. While Ben and Sammy respond to an insane bank robbery call.

The Ortega family’s annual Christmas Eve party is destroyed when a man dressed as Santa, wielding handguns and a homemade flame-thrower opens fire. Detectives are led down a terrifying path that leads them to a sociopath.

Herrmann and Mouch prepare to take their officer exams. Cruz receives a chilling omen. Carver takes care of a dog after its owner is injured on a call.

Cruz’s past comes back to haunt him. Severide prepares to teach an arson class at the academy. Mouch searches for a victim’s next of kin.

After discovering that their older brother is responsible for hiding a valuable piece of information, Tal and Mariah track down a reluctant Addison for answers.

In order to solve an actor’s murder, Alec and Rose must go undercover to infiltrate a community theater production of “Little Shop of Horrors.” Joining the cast, however, may put them right in the killer’s crosshairs.

When a media mogul is murdered, Patrick Jane and the CBI team investigate cult leader Bret Stiles, who may have had an axe to grind following the publication of a critical story about his group.

Cruz’s past comes back to haunt him. Severide prepares to teach an arson class at the academy. Mouch searches for a victim’s next of kin.