Lilli Palmer
— Lygia da Silva
James Mason
— Captain Blayne
Gabriele Ferzetti
— Leonardi
Alberto Lupo
— Magri
Valeria Fabrizi
— Susanne
Renato De Carmine
— Ghedini
Daniele Vargas
— Brauzzi
Andrew Keir
— O'Brien
Gabriele Tinti
Jeremy Burnham
Paul Müller
— Police Commander
Gianni Solaro
— Admiral Mendoza
Andrea Checchi
— Micheluzzi
Geoffrey Keen
— Hodges