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