Richard Arlen
— Mal Stevens
Virginia Bruce
— Eleanor Spencer
Alice Brady
— Aunt Ethel
Bruce Cabot
— Joe Keefer
Eric Linden
— Buddy Spencer
Gordon Jones
— Tex
Dorothy Appleby
— Lola McArdle
Barbara Pepper
— Milly Adams
J. Farrell MacDonald
— Mr. Keefer
Bodil Rosing
— Mrs. Keefer
Matthew Betz
— Al Thompson
Joyce Compton
— Barbara
Hale Hamilton
— Senator Reilly
Sidney Bracey
— Butler at Spencer Home
Paul Fix
— Sam
Christian Rub
— Heinrich Henkel
Harry Woods
— Big Bill
Joseph Crehan
— Memory Test Instructor
Jonathan Hale
— Microscopic Expert
Harvey Stephens
— Van Rensseler