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Sam Bottoms as Greg Oliver |
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Susanne Reed as Rachel McNamara |
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Virgil Frye as Earl Sullivan |
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Kedric Wolfe as Oscar Forbes |
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Charles Howerton as Dr. David Whiting |
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Denise Hayes as Iris Lee |
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Chuck Doherty as Ed Bennett |
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Helen McNeely as Louellen Bennett |
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Ken Metcalfe as Mr. Holland |
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Randy Taylor as Jimmy |
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Dave D'Martyn as Tourist #1 |
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Clem Persons as Maintenance Man (as Clem Parsons) |
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Peter Cooper as Nieberg |
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Katherine Scholy as Darleen |
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Ken Petruic as Harry |
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Bobby Greenwood as Tourist #2 |
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R. Lee Ermey as Arnold (uncredited) |
| Directing | Charles B. Griffith | Director |
| Writing | Alfred M. Sweeney | Screenplay |
| Production | Cirio H. Santiago | Producer |
| Camera | Ricardo Remias | Director of Photography |
| Production | Jill Griffith | Associate Producer |
| Production | Manny Norman | Associate Producer |
| Production | Rolando S. Atienza | Executive Producer |
| Sound | James Horner | Original Music Composer |
| Editing | Gervacio Santos | Editor |
| Art | Peque Gallaga | Production Design |
| Crew | Chris Walas | Special Effects |
| Crew | Robert Short | Special Effects |
| Crew | Santos Hilario | Special Effects |
| Writing | Anne Dyer | Writer |
| Production | Roger Corman | Producer |
| Art | Ben Otico | Art Direction |
| Directing | Leo Martinez | Assistant Director |
| Directing | Bert Amazan Jr. | Script Supervisor |
| Sound | Willie Arce | Sound |
| Camera | Peque Gallaga | Underwater Director of Photography |
| Sound | Restie Umali | Music Director |
