Lionel Barrymore

Andre Dakkar

Jacqueline Gadsden

Sonia Dakkar

Lloyd Hughes

Nikolai Roget

Montagu Love

Falon

Montagu Love

Mikhail

Snitz Edwards

Anton

Gibson Gowland

Dmitry

Dolores Brinkman

Teresa

Karl Dane

(uncredited)

Pauline Starke

(uncredited)

Carl Roup

Underwater Creature (uncredited)

Angelo Rossitto

Underwater Creature

Lucien Hubbard

Maurice Tourneur

Benjamin Christensen