José Manuel Marcos

Dick Sand

Edmund Purdom

Admiral Marlowe

Marc Cassot

Captain Hull

Doris Thomas

Clara Marlowe

Howard Vernon

Korda

Armand Mestral

Harris

William Berger

Negoro

Fernando Bilbao

Hercules

Sergio Mendizábal

Benedict

Luis Barboo

Sailor

Alberto Dalbés

Vargas

Marisol Delgado

Clara's maid

Gonzalo Cañas

Bat

Perrette Pradier

Clara Marlowe (voice) (uncredited)

Jesús Franco