Diễn viên
Hans Nielsen
Immerman
Dieter Borsche
Dr. Miller
Ann Sears
Stevenson's secretary
Alister Williamson
Inspector Pike
Jeremy Spenser
Martin Holt
Bryan Pringle
Dance Hall MC (uncredited)
Anne Heywood
Anna Holt
George A. Cooper
Thomas Gabler
Allan Cuthbertson
Da Silva
Bernard Lee
Dr. Frank Shears
Ellen Schwiers
Ella
Siegfried Lowitz
Mr. Walters
Maxine Audley
Marion Fane
Jack MacGowran
Furber
John Junkin
Frederick (uncredited)
Peter van Eyck
Dr. Peter Corrie
Cecil Parker
Stevenson