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The Night Killer is the fourth episode of the sixth season of Quincy, M.E., and the eighty-sixth episode overall.
Guest Stars: Tyne Daly (Madeline Estes), Robert Ginty (Bill Estes), Jonathan Segal (Dr. Bob Gage), Irene Tedrow (Mrs. Estes), Patricia Barry (Dr. Hotchkiss)
Co-Starring: Alex Hyde-White (Leo), Cheryl Carter (Cleo), Davis Roberts (Mr. Marlin), Michael Griswold (Paul)
With: Marc Scott Taylor (Mark), Carl Reindel (Roger), Teri Beckerman (Nora), Mary Ball (Bonnie), Eddie Garrett (Eddie)