Directed by
| Jacques Tourneur | ||
| Ishirô Honda | ... | (earlier film clips) (uncredited) |
Writing Credits
| Charles Bennett | ... | (screenplay) and |
| Louis M. Heyward | ... | (screenplay) |
| Edgar Allan Poe | ... | (based on "City in the Sea") |
| David Whitaker | ... | (additional dialogue) (as David Whittaker) |
Cast (in credits order) verified as complete
| Vincent Price | ... | The Captain, Sir Hugh | |
| Tab Hunter | ... | Ben Harris | |
| David Tomlinson | ... | Harold Tufnell-Jones | |
| Susan Hart | ... | Jill Tregillis | |
| John Le Mesurier | ... | Rev. Jonathan Ives | |
| Henry Oscar | ... | Mumford (as Harry Oscar) | |
| Derek Newark | ... | Dan | |
| Roy Patrick | ... | Simon | |
 |
Herbert the Rooster | ... | Herbert the Rooster |
| Rest of cast listed alphabetically: | |||
|
|
Bart Allison | ... | First Male Guest (uncredited) |
| John Barrett | ... | Third Fisherman (uncredited) | |
|
|
Dennis Blake | ... | Harry (uncredited) |
|
|
Steven Brooke | ... | Ted (uncredited) |
|
|
Barbara Bruce | ... | First Woman Guest (uncredited) |
|
|
Hilda Campbell-Russell | ... | Second Woman Guest (uncredited) |
| Arthur Hewlett | ... | First Fisherman (uncredited) | |
|
|
Michael Heyland | ... | Bill (uncredited) |
| William Hurndell | ... | Tom (uncredited) | |
|
|
George Ricarde | ... | Second Male Guest (uncredited) |
| Tony Selby | ... | George (uncredited) | |
| Walter Sparrow | ... | Second Fisherman (uncredited) | |
|
|
Jim Spearman | ... | Jack (uncredited) |
Produced by
| Samuel Z. Arkoff | ... | executive producer (uncredited) |
| Nat Cohen | ... | executive producer (uncredited) |
| Daniel Haller | ... | producer |
| Stuart Levy | ... | executive producer (uncredited) |
| James H. Nicholson | ... | executive producer (uncredited) |
| George Willoughby | ... | executive producer / producer (uncredited) |
Music by
| Stanley Black | ||
Cinematography by
| Stephen Dade | ... | (photographed by) |
Editing by
| Gordon Hales | ||
Casting By
| Harvey Woods | ||
Art Direction by
| Frank White | ... | (art direction by) |
Makeup Department
| Elsie Alder | ... | hairdresser |
| W.T. Partleton | ... | makeup artist (as Bill Partleton) |
| Geoffrey Rodway | ... | makeup artist (as Geoff Rodway) |
Production Management
| Pat Green | ... | production manager |
Second Unit Director or Assistant Director
| David Tringham | ... | assistant director |
Art Department
| Leon Davis | ... | construction manager |
| Colin Southcott | ... | set dresser |
| Peter Wood | ... | scenic artist |
Sound Department
| C. Le Mesurier | ... | sound (as C. Le Messurier) |
| Allan Morrison | ... | dubbing editor |
| Ken Rawkins | ... | sound |
Special Effects by
| Les Bowie | ... | special effects |
| Frank George | ... | special effects |
| Eiji Tsuburaya | ... | director of special effects: footage taken from the Toho production "Atragon" (uncredited) |
Visual Effects by
| Bob Cuff | ... | matte painter (uncredited) |
Camera and Electrical Department
| Ronnie Maasz | ... | camera operator |
| Ginger Gemmel | ... | underwater photographer (uncredited) |
| John Lane | ... | underwater photographer (uncredited) |
Costume and Wardrobe Department
| Ernie Farrer | ... | wardrobe supervisor |
Script and Continuity Department
| Tilly Day | ... | continuity |
Additional Crew
| Samuel Z. Arkoff | ... | presenter: US version |
| Nat Cohen | ... | presenter |
| Stuart Levy | ... | presenter |
| James H. Nicholson | ... | presenter: US version |
| Reynold Brown | ... | movie poster art (uncredited) |
