Dan Curtis Director, Producer Karen Black Julie, Millicent Larimore, Therese Larimore, Amelia Actor Robert Burton Chad Foster Actor John Karlen Thomas Amman Actor George Gaynes Dr. Chester Ramsey Actor Jim Storm Eddie Nells Actor Gregory Harrison Arthur Moore Actor Kathryn Reynolds Anne Richards Actor Tracy Curtis Tracy Actor Orin Cannon Motel Clerk Actor William F. Nolan Screenwriter Paul Lohmann Cinematographer Les Green Film Editing Bob Cobert Original Music Jan Scott Art Director Leonard A. Mazzola Set Decoration Gail Melnick Casting