S4, E9: Chris and his family return to the city for a visit. But Chris’ reunion with his rookie family takes a shocking turn when his son, Christian, is abducted from a local park while under the care of Andy and Nick. It’s all hands on deck at 15 Division in an effort to find Christian and his captor. As Swarek questions Andy and Nick about what happened at the playground, he inevitably uncovers the truth about their budding relationship. Meanwhile, Traci attempts to gather information from a devastated Denise, as Chris struggles with being treated like a victim, and kept in the dark about the investigation - unable to do any police work. But even getting Christian home safely can’t spare Chris from a startling revelation that may tear his family apart.