The Triton (prologue) (as Uni Apollon)
Don Esteban Ferragut (prologue) (as Alex Nova)
Don Esteban's Son - Ulysses (prologue)
Caragol (prologue)
Freya Talberg
Ulysses Ferragut
Ferragut's Wife - Dona Cinta (as Mle. Kithnou)
Ferragut's Son - Esteban (as Michael Brantford)
Ferragut's Niece - Pepita
Toni - the Mate (as Fredrick Mariotti)
Doctor Fedelmann (as Mme. Paquerette)
Count Kaledine
Submarine Commander (as André von Engelman)
Servant (uncredited)