| Gregory Peck | Cmdr. Dwight Lionel Towers, USS Sawfish |
| Ava Gardner | Moira Davidson |
| Fred Astaire | Julian Osborne |
| Anthony Perkins | Lt. Cmdr. Peter Holmes, Royal Australian Navy |
| Donna Anderson | Mary Holmes |
| John Tate | Adm. Bridie |
| Harp McGuire | Lt. Sunderstrom |
| Lola Brooks | Lt. Hosgood |
| Ken Wayne | Lt. Benson |
| Guy Doleman | Lt. Cmdr. Farrel |
| Director | Stanley Kramer |
| Producer | Stanley Kramer |
| Writer | Nevil Shute; John Paxton |
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