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