Perry Mason
Warren William
Della Street
Genevieve Tobin
District Attorney C. Manchester
Henry O'Neill
Police Officer Ricker
Charles C. Wilson
Detective Johnson
Joseph Crehan
Dr. Croker
Olin Howland
Spudsy's Wife
Mary Treen
George Sanborne (as Joseph Downing)
Joe Downing
Margie Florence Clune
Patricia Ellis
Dr. Robert Doray
Lyle Talbot
Spudsy Drake
Allen Jenkins
Bisonette
Barton MacLane
Thelma Bell
Peggy Shannon
Col. Bradbury
Porter Hall
Eva Lamont
Anita Kerry
Frank Patton
Craig Reynolds
Director
Archie Mayo
Director of Photography
Tony Gaudio
Writer
Brown Holmes
Screenplay
Ben Markson
Adaptation
Jerome Chodorov
Music Director
Leo F. Forbstein
Editor
James Gibbon
Art Direction
Hugh Reticker
Novel
Erle Stanley Gardner