Directed by
| Charles B. Griffith | ||
Writing Credits
| Alfred M. Sweeney | ... | (screenplay) |
| Anne Dyer | ... | (uncredited) |
Cast (in credits order)
| Sam Bottoms | ... | Greg Oliver | |
| Susanne Reed | ... | Rachel McNamara | |
| Virgil Frye | ... | Earl Sullivan | |
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Kedric Wolfe | ... | Oscar Forbes |
| Charles Howerton | ... | Dr. David Whiting | |
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Denise Hayes | ... | Iris Lee |
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Chuck Doherty | ... | Ed Bennett (as Charles Doherty) |
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Helen McNeely | ... | Louellen Bennett (as Helen McNelly) |
| Ken Metcalfe | ... | Mr. Holland (as Ken Metcalf) | |
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Randy Taylor | ... | Jimmy |
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Dave D'Martyn | ... | Tourist #1 |
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Clem Persons | ... | Maintenance Man (as Clem Parsons) |
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Pete Cooper | ... | Nieberg |
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Katherine Scholy | ... | Darleen |
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Ken Petruic | ... | Harry |
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Bobby Greenwood | ... | Tourist #2 |
| Rest of cast listed alphabetically: | |||
| R. Lee Ermey | |||
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Jim Babb | ... | Newsman (uncredited) |
| Don Gordon Bell | ... | Drunk Party guest (uncredited) | |
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Dorothy Burham | ... | Sandy Kane (uncredited) |
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Joe Crawford | ... | Extra (uncredited) |
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Phyllis Crawford | ... | Extra (uncredited) |
Produced by
| Rolando S. Atienza | ... | executive producer (as Jack Atienza) |
| Roger Corman | ... | executive producer (uncredited) |
| Jill Griffith | ... | associate producer |
| Manny Norman | ... | associate producer |
| Cirio H. Santiago | ... | producer |
Music by
| James Horner | ... | (uncredited) |
Cinematography by
| Ricardo Remias | ... | director of photography (as Rick Remington) |
Editing by
| Gervacio Santos | ... | (as G.V. Bass) |
| R.J. Kizer | ... | (uncredited) |
Production Design by
| Peque Gallaga | ... | (as Maurice Gallagher) |
Art Direction by
| Ben Otico | ||
Production Management
| Marty David | ... | production manager |
| Steven Kovacs | ... | production supervisor |
Second Unit Director or Assistant Director
| Leo Martinez | ... | assistant director (as Lou Martin) |
Sound Department
| Willie Arce | ... | sound (as Willie Archer) |
| Hoppy Mehterian | ... | re-recording mixer (uncredited) |
| Kendrick Sweet | ... | supervising sound editor (uncredited) |
Special Effects by
| Santos Hilario | ... | special effects (as Sandy Hill) |
| Robert Short | ... | special effects |
| Chris Walas | ... | special effects |
Camera and Electrical Department
| James Arce | ... | underwater camera operator |
| Proceso Lazaro | ... | camera operator: second unit (as Ross Lazarus) |
| Patric J. Abaravich | ... | electrician (uncredited) |
Editorial Department
| Susan Manning | ... | first assistant editor (uncredited) |
Music Department
| Restie Umali | ... | composer: additional music (as Russell O'Malley) / musical director (as Russell O'Malley) |
Script and Continuity Department
| Bert Amazan Jr. | ... | script supervisor (as Bert Mars Jr.) |
Additional Crew
| Peque Gallaga | ... | underwater director (as Pete Gallagher) |
| Sammy Umali | ... | production coordinator (as Sam O'Malley) |
| Kent Adamson | ... | production assistant (uncredited) |
