Raf Vallone
Carlo Ferri
Franco Fabrizi
Antonio
Ettore Manni
Marco
Andrea Checchi
Giorgio
Enrico Maria Salerno
Virgilio
Christian Marquand
Paolo
Bud Spencer
Magrini
Franco Chianese
Submariner
Emilio Cigoli
Nerio Bernardi
Captain Mauri
Evar Maran
Survivor
Giovanni De Fazio
Pietro
Paolo Bergamaschi
Survivor #2
Elena Varzi
Anna Avanzi
Lydia Simoneschi
(Voice dubbing for Elena Varzi)
Stefano Sibaldi
(Voice dubbing for Franco Farbrizi)
Giuseppe Rinaldi
(Voice dubbing for Bud Spencer/Carlo Pedersoli)
Mario Pisu
(Voice dubbing for Emilio Cigoli)
Bruno Persa
(Voice dubbing for Bud Spencer/Carlo Pedersoli)
Giulio Panicali
(Voice dubbing for Enrico Maria Salerno)
Pino Locchi
(Voice dubbing for Christian Marquand)
Gualtiero De Angelis
(Voice dubbing for Ettore Manni)
Emilio Cigoli
(Voice dubbing for Raf Vallone)
Giorgio Capecchi
(Voice dubbing for Andrea Checchi)
Manlio Busoni
(Voice dubbing for Franco Fabrizi)
Federico Scarlatti
Commandante sommergible
Albino Morandin
Capo pontone
Livio Lorenzon
Sergente
Cesare Fantoni
Ammiraglio a Roma
Saverio Capriò
Un terzo superstite
Dora Calindri
Madre di Virgilio
Gino Anglani
Agente segreto
Evar Maran
Un superstite
Emilio Cigoli
Ammiraglio Bragadin
Nerio Bernardi
Capitano Mauri
Paolo Bergamaschi
Un secondo superstite
Victor De Santis
Underwater Camera
Renzo Avanzo
Assistant Director
Antonio Modica
Camera Operator
Renato Cinquini
Editor
Milena Splendore Pulejo
Script Supervisor
Gian Giacomo Cossa
Assistant Director
Dino De Laurentiis
Producer
Franco Brusati
Screenplay
Guido Malatesta
Script Supervisor
Mario Parapetti
Camera Operator
Angelo Francesco Lavagnino
Music
Carlo Ponti
Producer
Gian Giacomo Cossa
Screenplay
Cleofe Conversi
Assistant Editor
Antonio Leonviola
Director
Thea Boggiatto
Makeup Artist
Giorgio Giovannini
Set Designer
Flavio Mogherini
Art Direction
Riccardo Pallottini
Cinematography
Ennio De Concini
Screenplay
Carlo Lizzani
Screenplay
Amelio Verona
Sound
Marc-Antonio Bragadin
Screenplay