A Sudden Fish

Medavoy suffers a stress-related anxiety attack after making into the station. Sipowicz looks into the robbery of a Vietnam veteran, who's confined to a wheelchair. Andy rejects a gift from Sylvia. John starts moonlighting as a bodyguard for his rich friend's girlfriend, but he catches her in the act of being unfaithful. When he confronts her, she tells him that she's being blackmailed, so Kelly meets the blackmailer and advises him not to do it again. Medavoy doesn't want to tell his wife about his problem, which displeases Donna, and he thinks he still may want a divorce. The wheelchair-bound veteran takes his mugger's hostage. Laura invites John out to dinner and tells him about her serious relationship. John is best man at an impromptu wedding.