After "The Poseidon Adventure", in which the ship got flipped over by a tidal wave, the ship drifts bottom-up in the sea. While the passengers are still on board waiting to be rescued, two rivaling salvage parties enter the ship on search for money, gold and a small amount of plutonium.
| Production | Irwin Allen | Producer |
| Writing | Nelson Gidding | Screenplay |
| Writing | Paul Gallico | Writer |
| Directing | Irwin Allen | Director |
| Costume & Make-Up | Kathleen McCandless | Costumer |
| Camera | Joseph F. Biroc | Director of Photography |
| Crew | Janet Brady | Stunts |
| Crew | Marneen Fields | Stunt Double |
| Crew | Paul Stader | Stunt Coordinator |
| Crew | Bob Bralver | Stunts |
| Crew | Joe Cirillo | Stunts |
| Crew | John Epper | Stunts |
| Crew | George P. Wilbur | Stunts |
| Crew | Fred Scheiwiller | Stunts |
| Crew | Hubie Kerns Jr. | Stunts |
| Crew | Vince Deadrick Sr. | Stunts |
| Crew | Justin De Rosa | Stunts |
| Crew | Peter Stader | Stunts |
| Crew | Henry Wills | Stunts |
| Crew | Fred Zendar | Stunts |
| Crew | Preston Peterson | Stunts |
| Crew | Kay Kimler | Stunts |
| Lighting | Larry Gilhooly | Gaffer |
| Production | Al Gail | Associate Producer |
| Sound | Jerry Fielding | Music |
| Editing | Bill Brame | Editor |
| Production | Jack Baur | Casting |
| Art | E. Preston Ames | Production Design |
| Art | Stuart A. Reiss | Set Decoration |
| Costume & Make-Up | Paul Zastupnevich | Costume Design |
| Costume & Make-Up | Chuck Crafts | Makeup Artist |
| Costume & Make-Up | Tom Ellingwood | Makeup Artist |
| Costume & Make-Up | Darby Hoppin | Hairstylist |
| Costume & Make-Up | Tony Lloyd | Makeup Artist |
| Costume & Make-Up | Lola 'Skip' McNalley | Hairstylist |
| Costume & Make-Up | Don Schoenfeld | Makeup Artist |
| Costume & Make-Up | Don Sheldon | Hairstylist |
| Production | Norman A. Cook | Production Manager |
| Directing | Mike Salamunovich | Assistant Director |
| Directing | Lindsley Parsons III | Second Assistant Director |
| Art | Harold Fuhrman | Set Designer |
| Crew | Howard Jensen | Special Effects |
| Crew | Ted Koerner | Special Effects |
| Crew | Gary Zink | Special Effects |
| Camera | Kenneth Peach Jr. | Camera Operator |
| Camera | Frederic J. Smith | Camera Operator |
| Camera | Eric D. Anderson | First Assistant Camera |
| Camera | Richard Barth | First Assistant Camera |
| Camera | Howard Ford | Assistant Camera |
| Camera | John Monte | Still Photographer |
| Camera | Gordon Paschal | Assistant Camera |
| Camera | Frank Redmond | Assistant Camera |
| Camera | Richard Turner | Assistant Camera |
