Nick Wechsler

After Hal and Lois leave town for a getaway, "squatters" crash Reese's party, take over the house and refuse to leave.

Rebecca hosts a dinner party. Kevin tries to support those around him. Randall faces concerns about how his family is adjusting to their new home.

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

Evidence from the case of a young woman who was shot to death confirms the Chicago P.D. has a serial killer on its hands; Voight welcomes Kenny Rixton to the team when Ruzek takes another assignment.

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.

Olinsky goes under cover as a hit man for hire after Lindsay is tipped off about a grieving father looking to avenge his daughter's death; when Ruzek returns from his undercover assignment, Voight puts him on patrol duty.