Chicago P.D.

As Atwater finds himself distracted by a past case, a CI from his past resurfaces with a tip on a string of armed robberies that are raising concerns.

Upton becomes consumed with a decades-old missing persons case linked to Petrovic after a young child shows up to the district seeking help.

Torres' personal involvement with an informant jeopardizes his safety and threatens to expose an undercover operation.

Upton brings SVU detective Petrovic back into the fold to help with the investigation of a tender-age kidnapping.

An ongoing case hits close to home for Voight as Intelligence teams up with an SVU detective to track down a prolific offender.

Intelligence teams up with ASA Chapman to take on an abduction case involving a teenager. The case hits close to home for Voight, leading him to take a personal interest in finding justice for the victim.

Atwater turns to an unlikely source of support when a string of jewelry store robberies shakes his confidence.

Returning from furlough, Torres goes undercover in a tense and high-stakes drug trafficking case.

Burgess works an extra shift at the 13th District and gets caught in the middle of a drive-by attack on refugees. The team works together to track down the shooter and uncover the true motive behind the attack.

Ruzek gets mixed up in a case after a late-night poker game is raided. Afraid of becoming like his father, Ruzek struggles to stand down and allow Intelligence to carry out the investigation.

Tasked with shadowing a crisis prevention team, Upton finds her approach to policing at odds with the team's mental health clinician. Voight stands by Upton as she continues to struggle in her personal life.