بيلا لوغوسي
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
Irving Mitchell
John Van Dyke
Edward Peil Sr.
Ryder
Kenneth Harlan
FBI Chief Colton
Max Hoffman Jr.
Kearney
Joseph Eggenton
Stevens
I. Stanford Jolley
The Dragon
Frank Melton
FBI Agent
المخرج
William Nigh
الكتّاب
Robert Kehoe، Harvey Gates
الموسيقى
Johnny Lange، Lew Porter، Heinz Roemheld
التصوير
Arthur Reed
المونتاج
Carl Pierson
