Warren William

Character: Perry Mason

Genevieve Tobin

Character: Della Street

Patricia Ellis

Character: Margie Florence Clune

Lyle Talbot

Character: Dr. Robert Doray

Allen Jenkins

Character: Spudsy Drake

Barton MacLane

Character: Bisonette

Peggy Shannon

Character: Thelma Bell

Porter Hall

Character: Col. Bradbury

Anita Kerry

Character: Eva Lamont

Craig Reynolds

Character: Frank Patton

Henry O'Neill

Character: District Attorney C. Manchester

Charles C. Wilson

Character: Police Officer Ricker

Joseph Crehan

Character: Detective Johnson

Olin Howland

Character: Dr. Croker

Mary Treen

Character: Spudsy's Wife

Joe Downing

Character: George Sanborne (as Joseph Downing)