S2, E18: Intelligence responds to a drug robbery gone wrong and in their investigation it’s revealed that the first person Voight (Jason Beghe) ever gave his card to is linked to a double murder. Voight will fight to keep her family safe. At the same time, we learn the real reason why Halstead’s (Jesse Lee Soffer) brother Will (guest star Nick Gehlfuss) came to Chicago. Meanwhile Desk Sgt. Platt (Amy Morton) takes care of a young girl at district.