A deranged ex-cop has planted a bomb in the city and will give the location to Nash only if Nash kills Joe. Meanwhile Nash must also handle bringing Harvey a new partner, evicting Joe and Inger, and Cassidy's first day on duty. Inger and Joe purchase a house that seems too good to be true.

Nash pursues an old flame who is involved with an arms dealer; Joe takes a private domestic case to discover if a symphony conductor is having an affair; Cassidy struggles to let go of Evan's memory when she is asked out on a date.