Cast
Bela Lugosi
Dr. Melcher/ Monsieur Colomb
Clayton Moore
FBI Agent Richard ‘Dick’ Martin
Joan Barclay
Alice Saunders
George Pembroke
Dr. William Saunders
Robert Frazer
Amos Hanlin
Robert Fiske
Phillip Wallace
I
Irving Mitchell
John Van Dyke
Edward Peil Sr.
Ryder
Kenneth Harlan
FBI Chief Colton
Max Hoffman Jr.
Kearney
J
Joseph Eggenton
Stevens
I. Stanford Jolley
The Dragon
Frank Melton
FBI Agent
