On screen
Cast
15 credited performers
Forrest Tucker
Baron Keller
Eva Bartok
Baron Keller
Marius Goring
Baron Keller
Guy Middleton
Maj. Hobart
Eric Pohlmann
Emile
Arnold Marlé
Prof. Pal Kudnic
Fred Johnson
Chief Agent Farquarson
David King-Wood
Col. Patchway
Reginald Beckwith
Dusty
Guido Lorraine
Franz
Artwork unavailable
Andre Mikhelson
Russian thug answering Ludwigstrasse door
Artwork unavailable
Stanley Zevic
Russian thug #2 at Ludwigstrasse address
Marne Maitland
The phony Kudnic
Artwork unavailable
Arthur Lovegrove
Bert
Artwork unavailable
Derek Prentice
Keller's butler