Mare Nostrum

Apollon Uni

The Triton (prologue) (as Uni Apollon)

Álex Nova

Don Esteban Ferragut (prologue) (as Alex Nova)

Kada-Abd-el-Kader

Don Esteban's Son - Ulysses (prologue)

Hughie Mack

Caragol (prologue)

Alice Terry

Freya Talberg

Antonio Moreno

Ulysses Ferragut

Mademoiselle Kithnou

Ferragut's Wife - Dona Cinta (as Mle. Kithnou)

Mickey Brantford

Ferragut's Son - Esteban (as Michael Brantford)

Rosita Ramírez

Ferragut's Niece - Pepita

Frédéric Mariotti

Toni - the Mate (as Fredrick Mariotti)

Madame Pâquerette

Doctor Fedelmann (as Mme. Paquerette)

Fernand Mailly

Count Kaledine

Andrews Engelmann

Submarine Commander (as André von Engelman)

John George

Servant (uncredited)