The Amazing Dr. Clitterhouse

Edward G. Robinson

Dr. T.S. Clitterhouse

Claire Trevor

Jo Keller

Humphrey Bogart

'Rocks' Valentine

Allen Jenkins

Okay

Donald Crisp

Police Inspector Lewis Lane

Gale Page

Nurse Randolph

Henry O'Neill

Judge

John Litel

Mr. Monroe, Prosecuting Attorney

Thurston Hall

Grant

Ward Bond

Tug

Ronald Reagan

Radio Announcer (voice) (uncredited)

Mary Field

Millie - Mrs. Updyke's Maid (uncredited)