Cast
Julian Madison
Charlie Penlon
Robert McKenzie
Sheriff Graves, Sheriff
Doris Lloyd
Lucille Coates
Herbert Bunston
College Professor
Robert Warwick
Joseph Harris
John Davidson
Professor Brand
Broderick O'Farrell
Dr. Howell
Eric Mayne
Professor at Service (Uncredited)
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
George Morrell
Deputy Ab Barber
Eddie Tamblyn
Bill Smart
Jane Keckley
Bostwick's Housekeeper