Aben
Bertram Gribble
Akela (voice)
Heller
Rozner
Fred
Emile
Mr. Pappas
Charles Murdock
Peter Althius (uncredited)
Coroner
Kaspar Andropolous
Frederick Fairlie
Chris Martin
Martin S. Dwyer
Mayor Tuvache
English Spy
Sykes
Manuel
2nd Gambler
Jodri
Lunin
Dr. Ferris
Webb Fallon
Count Stephen Duni
Abel Harmer
Lal Bara
Pappa Cerrano
Pierre
Gregorius
Mr. Twyning
Himself – Ms. Robson's Host (uncredited)
Marshovian Ambassador
Mortimer Cope
Salesman
Huish
Yusuf
Herbert Bielensen
Jack Rawlings
Welles
Max Leiberman
André
Alfonse Lamont
Jimmy Gordon
Dumbo
Surgeon
Phya Phrom
Roscoe Bean
Hostage (scenes deleted)
Mustafa el Melik
Banker Irwing
Joseph Baronova
Dr. Reinhart
Flower Seller
Jean-François Pilâtre de Rozier
Hood with Foreign Accent
Starving Beggar
Poppy's Escort
Professor Radowsky
Joe
Carl aka Charles
Baker
Gregory Vanesou
Roland X. Smith (uncredited)
Grinko (uncredited)
Reporter (uncredited)
Mason
Ali
Nitra Puta
Don Daniel
Dipso Dale Rutherford
Mr. Orlandos
Duquai
Dr. Frankenstein
Dr. Sawyer
Will Scarlet
Commissioner's Laywer
Armand
Dr. Durrant
Ayleborn
Conrad Jaeger
Prof. Gorak
Sesmar
Professor Lute Bone
Prof. Carlos Muntz
Travers
Professsor Meyerdal
Harwood Gones
Chang
Mr. Munro
Mouth Organist
Kriss Milo ('The Mask of Medusa')
Murdock
Senator Wigfall
Col. Barton
Sir Egbert
Professor Brent
Eddie
Sir Trevor Gielgud Burton-Guiness
Nathan
Dr. Durwood Tobey
The Cat
Professor MacIntyre
Sir Godwin Phipps-Cheston