Guest Stars Tom Braidwood as Melvin Frohike Bruce Harwood as John Fitzgerald Byers Dean Haglund as Richard "Ringo" Langly Steven Williams as Mr. X Signy Coleman as Susanne Modeski Richard Belzer as Detective John Munch Co Starring Glenn Williams as Officer Chris Nelson Norris as S.W.A.T. Lieutenant Stuart O'Connell as S.W.A.T. Cop #1