演职人员
作者
哈维·盖茨
导演
William Nigh
Dr. Melcher/ Monsieur Colomb
贝拉·卢戈西
FBI Agent Richard ‘Dick’ Martin
Clayton Moore
Alice Saunders
Joan Barclay
Dr. William Saunders
George Pembroke
Amos Hanlin
Robert Frazer
Phillip Wallace
Robert Fiske
John Van Dyke
Irving Mitchell
Ryder
Edward Peil Sr.
FBI Chief Colton
Kenneth Harlan
Kearney
Max Hoffman Jr.
Stevens
Joseph Eggenton
The Dragon
I·斯坦福·乔利
FBI Agent
Frank Melton