Don McGuire Director, Screenwriter Jerry Lewis Sidney L. Pythias Actor, Producer Darren McGavin Mike Damon Actor Martha Hyer Martha Henshaw Actor Horace McMahon Capt. Riley Actor Milton Frome Mr. Herman Actor Robert Ivers Monk Actor Richard Bakalyan Artie Actor Joe Corey Harry Actor Mary Webster Patricia Actor Jefferson Searles Mr. Crow Actor Rocky Marciano Self Emory Parnell Sgt. Levitch Actor Emile Meyer Sgt. Kelly Actor Dave Willock Police Cadet William C. Goerner Actor Buddy Bregman Original Music Haskell B. Boggs Cinematographer Howard Smith Film Editing A. Earl Hedrick Art Director Hal Pereira Art Director Sam Comer Set Decoration Ray Moyer Set Decoration Edith Head Costume Design