Richard Arlen as Mal Stevens

Virginia Bruce as Eleanor Spencer

Alice Brady as Aunt Ethel

Bruce Cabot as Joe Keefer

Eric Linden as Buddy Spencer

Gordon Jones as Tex

Dorothy Appleby as Lola McArdle

Barbara Pepper as Milly Adams

J. Farrell MacDonald as Mr. Keefer

Bodil Rosing as Mrs. Keefer

Matthew Betz as Al Thompson

Joyce Compton as Barbara

Hale Hamilton as Senator Reilly

Sidney Bracey as Butler at Spencer Home

Paul Fix as Sam

Christian Rub as Heinrich Henkel

Harry Woods as Big Bill

Joseph Crehan as Memory Test Instructor

Jonathan Hale as Microscopic Expert

Harvey Stephens as Van Rensseler