Two scuba divers find a shipwreck which may contain undiscovered treasure, however, their attempt to salvage it is threatened by scavengers.
Unfortunately the movie Underwater! is not yet available on HBO Max.
| Directing | John Sturges | Director |
| Art | Darrell Silvera | Set Decoration |
| Sound | Walter Elliott | Sound Effects |
| Sound | Terry Kellum | Sound |
| Costume & Make-Up | Mel Berns | Makeup Supervisor |
| Art | John Sturtevant | Set Decoration |
| Sound | C. Bakaleinikoff | Music Director |
| Crew | Howard Hughes | Presenter |
| Costume & Make-Up | Michael Woulfe | Costume Designer |
| Directing | William Dorfman | Assistant Director |
| Sound | Stanford Houghton | Sound |
| Editing | Frederic Knudtson | Editor |
| Editing | Stuart Gilmore | Editor |
| Costume & Make-Up | Larry Germain | Hairstylist |
| Costume & Make-Up | Layne Britton | Makeup Artist |
| Writing | Robert D. Bailey | Story |
| Writing | Hugh King | Story |
| Writing | Walter Newman | Screenplay |
| Camera | Harry J. Wild | Director of Photography |
| Production | Harry Tatelman | Producer |
| Art | Carroll Clark | Art Direction |
| Art | Albert S. D'Agostino | Art Direction |
| Costume & Make-Up | Mel Berns | Makeup Artist |
| Sound | Roy Webb | Original Music Composer |
