Gibson Gowland
Dmitry
Snitz Edwards
Anton
Lionel Barrymore
Andre Dakkar
Lloyd Hughes
Nikolai Roget
Karl Dane
(uncredited)
Montagu Love
Falon
Mikhail
Jacqueline Gadsden
Sonia Dakkar
Pauline Starke
Carl Roup
Underwater Creature (uncredited)
Dolores Brinkman
Teresa
