Nick Wechsler

While Hal and Lois take a romantic break, Reese throws a party at home, but the delinquent friends of Francis gatecrash and hold the boys hostage.

When a sex offender is found dead and mutilated, Intelligence look into a private police force that may be covering up illegal activities. Meanwhile Halstead runs a DNA check on Jimmy and discovers he is not Erin's father.

The waitress is getting married and Dee is jealous that she's beating her to the altar, so she tries to derail the wedding.

The team investigates a home explosion that left a charred body, one injured survivor and no witnesses. Lindsay and Halstead receive a strange warning about Rixton.

After the body of a young woman is found with multiple gunshot wounds, Intelligence identify links to other deaths and realise they are dealing with a serial killer. Lindsay finally meets her biological father.

Kevin takes the twins to the cabin in hopes of proving himself as a father.