Cast
Charles Starrett
Kenneth 'Ken' Harris
Edward Van Sloan
Professor Bostwick
Jane Keckley
Bostwick's Housekeeper
Eric Mayne
Professor at Service (Uncredited)
Marion Shilling
Jean Coates
Helen Jerome Eddy
Miss Lottie Case
James Bush
Byron Coates / John Meseraux
Robert McKenzie
Sheriff Graves, Sheriff
Doris Lloyd
Lucille Coates
Robert Warwick
Joseph Harris
Julian Madison
Charlie Penlon
Herbert Bunston
College Professor
Broderick O'Farrell
Dr. Howell
Eddie Tamblyn
Bill Smart
John Davidson
Professor Brand
George Morrell
Deputy Ab Barber