Mouch learns he may be a father. Dawson and Casey agree to take a break. The new Chief makes a tactical error and tries to put the blame on Casey. But Casey finds and unlikely ally in the case against him.moreless
Following the death of a 10-year old girl the intelligence unit have one option to gain access to their suspect, go on the inside. Ruzek and Atwater act as inmates to work the case from the inside. Outside prison, Voight and Olinsky follow-up on a good lead to answer some questions about the shooting. Meanwhile, Burgess and Roman show three boys around district thinking they are part of the Police Explorers program, only to realize that's not quite the case.moreless
As Briggs goes undercover into Markham's unit to prove they are working for the Cartel, Mike tries to access Markham's bank account. Meanwhile, Johnny gets closer to Lucia.
Jessica arrives at Graceland to announce that she's shutting down Mike's operation, prompting a last ditch attempt to grab Carlito and stop the pipeline of 'Tinkerbell' girls. Meanwhile, DJ receives an unexpected visitor.moreless
Olinsky's teenage daughter, Lexi witnessed a gang shooting, which would make her a target if she testifies; Ruzek helps Burgess on the undercover assignment; Halstead continues to investigate Lonnie Rodiger's activities; and Voight has to cope with the warnings of his IA contact Stillwell.moreless
As a new case comes to light, the intelligence unit searches for the source of ammunition meant to kill officers of the police department. Voight and his unit investigate a home associated with some major gangs. Meanwhile, Ruzek is encouraged to seek counseling for personal reasons. Halstead has some very unwelcome visitors from his past.moreless
Enemies circle as Emily is more lost than ever; a game-changing revelation leads to a new path of destruction.
Briggs is forced to into making a major decision when Mike looks into Juan's disappearance.
Tuturro and Jakes are convinced by Paige to go undercover with a marijuana farmer and a Nigerian drug lord recruits Mike to improve his gang's shooting skills.
Martin decides to be a reporter again, through Trevor. While Martin is desperately trying to get in touch with Calvin Norburg, he is summoned himself by Calvin. They devise a plan for Martin to get into the Aster Corps offices to retrieve Calvin's work by using the pass key of who Calvin sees as the one other disillusioned Aster Corps. In meantime Amelia is moved and Jake is starting to like a girl and like going school. In the meantime Ortiz is slowly closing in on determined to kill the thirty sixmoreless
Nora and Miles make a run for it back to the Rebel camp while Aaron and Maggie search for Grace.
An underage runaway's symptoms grow worse after she's brought in for treatment. When the team determines that the girl needs invasive surgery, they have to find her mother, who turns out to be a former drug addict. Meanwhile, House tries to blackmail Foreman using the hospital director's affair with a married woman, and Taub tries to connect with his infant daughters.moreless
The Graysons' quiet anniversary plans go off track and are replaced by an explosive family dinner. Meanwhile, Frank unearths some info on Emily in an attempt to prove his devotion to Victoria.
House attempts to negotiate with a wealthy patient who is planning to relocate his labor force to China. Meanwhile, Foreman chairs Park's disciplinary hearing, while Adams assesses her own ethics when she learns of their patient's relocation plans.moreless