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Ben Gazzara as Cmdr. Adrian Blake |
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Walter Pidgeon as Dr. Samuel Andrews |
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Ernest Borgnine as Chief Diver Don MacKay |
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Yvette Mimieux as Dr. Leah Jansen |
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Donnelly Rhodes as Diver Bob Cousins |
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Chris Wiggins as Capt. Williams |
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Michael J. Reynolds as Dr. Hal Hamilton |
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Mark Walker as Diver Dave Moulton |
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Leslie Carlson as Brigs, Triton Radioman |
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Stuart Gillard as Diver Phil Bradley |
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Ed McGibbon as Dr. Norton Shepherd |
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David Renton as Warrant Officer |
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Joan Gregson as Dobson |
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David Yorston as Diver Stephens |
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Ken Pogue as Diver Thomas |
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Dave Mann as Hawkes |
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Frank Perry as Sub Captain |
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不二稿京 as Kay, lab technician |
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Dan MacDonald as Lt. Hobbs, Halifax day officer |
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Richard Whelan as Radio Officer |
| Production | Sandy Howard | Producer |
| Sound | ლალო შიფრინი | Original Music Composer |
| Directing | Daniel Petrie | Director |
| Writing | Jack DeWitt | Writer |
| Camera | Harry Makin | Director of Photography |
| Sound | Austin Grimaldi | Sound Mixer |
| Sound | Kenneth Heeley-Ray | Sound Editor |
| Sound | Patrick Drummond | Assistant Sound Editor |
| Sound | Joe Grimaldi | Sound Mixer |
| Production | Gerry Arbeid | Production Manager |
| Production | Patricia Payne | Casting Director |
| Production | Harold Greenberg | Executive Producer |
| Production | David Perlmutter | Executive Producer |
| Editing | Stan Cole | Editor |
| Art | Dennis Lynton Clark | Production Design |
| Art | Jack McAdam | Production Design |
| Art | Edwin Watkins | Set Decoration |
| Costume & Make-Up | Bill Morgan | Makeup Artist |
| Costume & Make-Up | Christopher Tucker | Makeup Artist |
| Production | Deanne Judson | Unit Manager |
| Directing | Frank Ernst | Assistant Director |
| Crew | Warren Keillor | Special Effects |
| Crew | Lee Howard | Special Effects |
| Crew | Bill Hansard | Projection |
| Editing | Alan Kondo | Assistant Editor |
| Costume & Make-Up | Marcel Carpenter | Wardrobe Supervisor |
| Costume & Make-Up | Debi Weldon | Wardrobe Assistant |
