Nash and the SIU must re-open a serial killer's case file when a body is discovered and it appears to be Angel's. Bonnie, Harvey's ex-wife, returns with an interesting proposition. Joe and Caitlin square off as rival soccer coaches when their teams enter the playoffs.

An ex-cop Caitlin indicted gets out of prison and terrorizes her. Harvey has an affair with a woman he met undercover. Joe has urgent sex with ovulating Inger.