Trailer
Images
 | Raf Vallone as Carlo Ferri |
 | Franco Fabrizi as Antonio |
 | Ettore Manni as Marco |
 | Andrea Checchi as Giorgio |
 | Enrico Maria Salerno as Virgilio |
 | Christian Marquand as Paolo |
 | Bud Spencer as Magrini |
 | Franco Chianese as Submariner |
 | Emilio Cigoli |
 | Nerio Bernardi as Captain Mauri |
| Evar Maran as Survivor |
| Giovanni De Fazio as Pietro |
| Paolo Bergamaschi as Survivor #2 |
 | Elena Varzi as Anna Avanzi |
| Federico Scarlatti as Commandante sommergible |
| Albino Morandin as Capo pontone |
 | Livio Lorenzon as Sergente |
 | Cesare Fantoni as Ammiraglio a Roma |
| Saverio Capriò as Un terzo superstite |
| Dora Calindri as Madre di Virgilio |
| Gino Anglani as Agente segreto |
| Evar Maran as Un superstite |
| Emilio Cigoli as Ammiraglio Bragadin |
| Nerio Bernardi as Capitano Mauri |
| Paolo Bergamaschi as Un secondo superstite |
| Directing | |
| Antonio Leonviola | Director |
| Guido Malatesta | Script Supervisor |
| Milena Splendore Pulejo | Script Supervisor |
Editing | |
| Cleofe Conversi | Assistant Editor |
Camera | |
| Victor De Santis | Underwater Camera |
| Antonio Modica | Camera Operator |
| Mario Parapetti | Camera Operator |
Sound | |
| Amelio Verona | Sound |
Directing | |
| Renzo Avanzo | Assistant Director |
| Gian Giacomo Cossa | Assistant Director |
Costume & Make-Up | |
| Thea Boggiatto | Makeup Artist |
Art | |
| Giorgio Giovannini | Set Designer |
| Flavio Mogherini | Art Direction |
Editing | |
| Renato Cinquini | Editor |
Crew | |
| Riccardo Pallottini | Cinematography |
Sound | |
| Angelo Francesco Lavagnino | Music |
Production | |
| Dino De Laurentiis | Producer |
| Carlo Ponti | Producer |
Writing | |
| Marc-Antonio Bragadin | Screenplay |
| Franco Brusati | Screenplay |
| Gian Giacomo Cossa | Screenplay |
| Ennio De Concini | Screenplay |
| Carlo Lizzani | Screenplay |
