Sam Newfield Director Hugh Beaumont Michael Shayne Actor Cheryl Walker Phyllis Hamilton Actor Ralph Dunn Det. Sgt. Pete Rafferty Actor Paul Bryar Tim Rourke Actor Charles C. Wilson Chief Gentry Actor Douglas V. Fowley Doc H. C. Patterson Actor Gordon Richards Burton Stallings Actor Charles Quigley Arch Dubler Actor Julia McMillan Lucille Actor Marie Hannon Helen Stallings, Barbara Brett Actor Lee Bennett Whit Marlowe Actor Henry Hall Dr. F. C. Porter Actor Milton Kibbee Joe Morell Actor Sigmund Neufeld Producer Raymond L. Schrock Screenwriter Jack Greenhalgh Cinematographer Holbrook N. Todd Film Editing Edward C. Jewell Art Director Harry Reif Set Decoration