Commandante Carlo Ferri
Antonio
Giorgio
Marco
Virgilio
Paolo (as Cristian Marquand)
Magrini (as Carlo Pedersoli)
Anna Avanzi
Un secondo superstite
Capitano Mauri
Sommergibilista
Ammiraglio Bragadin
Pietro
Un superstite
Agente segreto (uncredited)
Madre di Virgilio (uncredited)
Un terzo superstite (uncredited)
Ammiraglio a Roma (uncredited)
Sergente (uncredited)
Capo pontone (uncredited)
Commandante sommergibile (uncredited)