A year after Sheila is killed in a hit-and-run, her multimillionaire husband invites a group of friends to spend a week on his yacht playing a scavenger hunt-style mystery game — but the game turns out to be all too real and all too deadly.
| Editing | Edward Warschilka | Editor |
| Writing | Anthony Perkins | Writer |
| Directing | Herbert Ross | Director |
| Writing | Stephen Sondheim | Writer |
| Production | Herbert Ross | Producer |
| Camera | Gerry Turpin | Director of Photography |
| Camera | Bob Penn | Still Photographer |
| Production | Stanley O'Toole | Executive Producer |
| Art | John Jarvis | Set Decoration |
| Camera | Derek V. Browne | Camera Operator |
| Art | Tony Roman | Art Direction |
| Costume & Make-Up | Joel Schumacher | Costume Design |
| Art | Ken Adam | Production Design |
| Sound | Billy Goldenberg | Original Music Composer |
| Directing | Annabel Davis-Goff | Script Supervisor |
| Costume & Make-Up | Mary Bredin | Hairstylist |
| Costume & Make-Up | Harry Frampton | Makeup Artist |
| Costume & Make-Up | Peter Frampton | Makeup Artist |
| Costume & Make-Up | Alaine Scemama | Hairstylist |
| Directing | Mishka Cheyko | Assistant Director |
| Directing | William C. Gerrity | Assistant Director |
| Sound | David Dockendorf | Sound Mixer |
| Sound | Derek Holding | Sound Editor |
| Sound | Richard Oswald | Sound Editor |
| Sound | Cyril Swern | Sound Recordist |
| Sound | Dan Wallin | Sound Re-Recording Mixer |
| Crew | Fred Stromsoe | Stunts |
| Editing | Don Zimmerman | Assistant Editor |
