Robert Warwick
Joseph Harris
Charles Starrett
Kenneth 'Ken' Harris
Marion Shilling
Jean Coates
Helen Jerome Eddy
Miss Lottie Case
Edward Van Sloan
Professor Bostwick
James Bush
Byron Coates / John Meseraux
Eddie Tamblyn
Bill Smart
Julian Madison
Charlie Penlon
Robert McKenzie
Sheriff Graves
Doris Lloyd
Lucille Coates
Ralph Brooks
Sam Anderson
Robert McKenzie
Sheriff
John Davidson
Professor Brand
Herbert Bunston
College Professor
George Morrell
Deputy Ab Barber
Broderick O'Farrell
Dr. Howell
Jane Keckley
Bostwick's Housekeeper
Eric Mayne
Professor at Service (Uncredited)
Charles Lamont
Director
Clifford Orr
Novel
Edward C. Jewell
Art Direction
Charles Belden
Adaptation
George R. Batcheller
Producer
Melville Shyer
Assistant Director
Charles Belden
Screenplay
Roland D. Reed
Editor
L.E. Clark
Sound Engineer
M.A. Andersen
Director of Photography
George R. Batcheller
Presenter
Lon Young
Production Supervisor
Abe Meyer
Music Director