Warren William as Perry Mason

Mary Astor as Bessie Foley

Allen Jenkins as Sgt. Holcomb

Grant Mitchell as District Attorney Claude Drumm

Helen Trenholme as Della Street

Helen Lowell as Elizabeth Walker

Dorothy Tree as Lucy Benton

Gordon Westcott as Arthur Cartwright

Harry Tyler as Sam Martin - Taxi Driver

Arthur Aylesworth as Sheriff Bill Pemberton

Russell Hicks as Clinton Foley

Frank Reicher as Dr. Carl Cooper

Addison Richards as Judge Markham

James P. Burtis as George Dobbs

Eddie Shubert as Ed Wheeler

Harry Seymour as David Clark

Stanley Blystone as Juror (uncredited)

Don Brodie as Reporter in Courtroom (uncredited)

Joseph Crehan as Captain Kelly (uncredited)

Bill Elliott as Reporter in Courtroom (uncredited)

Frank Fanning as Detective Driving Police Car (uncredited)

Jonathan Hale as Courtroom Spectator (uncredited)

Eddie Hart as Deputy (uncredited)

Milton Kibbee as Detective (uncredited)

Lightning the German Shepherd as Prince (uncredited)

Henry Otho as Bailiff (uncredited)

Joe Sawyer as Carl Trask (uncredited)

Charles Sherlock as Reporter with Camera in Courtroom (uncredited)

Monte Vandergrift as Detective (uncredited)

Jack Wise as Telegram Clerk (uncredited)