Supervisor Christine “Mooch" Muccino drives the shift through a series of crises including a fatal car accident and a horrific shooting in broad daylight, but nothing shakes her to the core more than when she learns of a crisis at home.

While searching for missing 37-year-old X-ray technician Teddy Cota, the team discovers that Teddy long believed that when he was a child, he was abducted by aliens.

Jack and the team must determine if a missing nanny is a kidnapping victim or a suspect when she and the infant in her care disappear from her employers' home.

John copes with the aftermath of his kidnapping, while Sammy closes in on the real robbers, Ben feels the pressure and Lydia becomes closer with Russell.

A murder at a medical marijuana dispensary tests Brenda.

While Cole gets into the holiday spirit for his first Christmas with Maya, Murtaugh hopes he can convince RJ to come back home from Costa Rica for the holidays. At the precinct, Cole and Murtaugh are saddled with a complicated burglary and home invasion case.

Cole finds himself on the rebound, and his new romantic interest has an unexpected connection to the A.D.A., complicating things at work. Meanwhile, Murtaugh worries about the connection between a case he's working and an opportunity for Trish on a high-profile lawsuit.

When Jane's brother-in-law returns to town and gets mixed up in a murder investigation, Jane must come to his aid despite personal reservations.

John copes with the aftermath of his kidnapping, while Sammy closes in on the real robbers, Ben feels the pressure and Lydia becomes closer with Russell.

911 Dispatcher Jackie Chappuies takes training rookie Hayley Kilbane into her own hands.

Supervisor Christine “Mooch" Muccino drives the shift through a series of crises including a fatal car accident and a horrific shooting in broad daylight, but nothing shakes her to the core more than when she learns of a crisis at home.

A murder at a medical marijuana dispensary tests Brenda.

Cole finds himself on the rebound, and his new romantic interest has an unexpected connection to the A.D.A., complicating things at work. Meanwhile, Murtaugh worries about the connection between a case he's working and an opportunity for Trish on a high-profile lawsuit.

When Jane's brother-in-law returns to town and gets mixed up in a murder investigation, Jane must come to his aid despite personal reservations.

John copes with the aftermath of his kidnapping, while Sammy closes in on the real robbers, Ben feels the pressure and Lydia becomes closer with Russell.

While searching for a missing nurse's aide, who disappeared from a rural road while changing a flat tire, the team discovers that this woman is actually a fugitive wanted for bombing an abortion clinic.

While searching for missing 37-year-old X-ray technician Teddy Cota, the team discovers that Teddy long believed that when he was a child, he was abducted by aliens.

Jack and the team must determine if a missing nanny is a kidnapping victim or a suspect when she and the infant in her care disappear from her employers' home.

A murder at a medical marijuana dispensary tests Brenda.

While Cole gets into the holiday spirit for his first Christmas with Maya, Murtaugh hopes he can convince RJ to come back home from Costa Rica for the holidays. At the precinct, Cole and Murtaugh are saddled with a complicated burglary and home invasion case.

Cole finds himself on the rebound, and his new romantic interest has an unexpected connection to the A.D.A., complicating things at work. Meanwhile, Murtaugh worries about the connection between a case he's working and an opportunity for Trish on a high-profile lawsuit.

When Jane's brother-in-law returns to town and gets mixed up in a murder investigation, Jane must come to his aid despite personal reservations.

John copes with the aftermath of his kidnapping, while Sammy closes in on the real robbers, Ben feels the pressure and Lydia becomes closer with Russell.

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.

The team responds to a crisis at a community center. Severide is forced to investigate one of his own Squad members. Kidd helps a teacher going through a post-incident spin-out.

Follows Talcott Garland, an esteemed law professor whose quiet life is shattered when his father, Judge Oliver Garland, dies of an apparent heart attack.

When Alec is recruited to assist with a multi-national prisoner exchange that has gone awry, he sees an opportunity to rescue a wrongfully imprisoned colleague. The case pulls Alec and Rose into the dangerous world of international espionage.

When Patrick Jane faces off once again with cult leader Bret Stiles, Stiles offers Jane information regarding Red John and the missing Kristina Frye.