Infatuated with the idea of becoming rich, college student Jonathan Corliss secretly dates Dorothy Carlsson to gain the approval of her wealthy father. When Dorothy tells Jonathan that she is pregnant and that her father will deny her inheritance if he finds out, Jonathan murders her, but he stages her death as a suicide. As Jonathan works his way onto Mr. Carlsson's payroll, Dorothy's twin sister, Ellen, investigates the apparent suicide.
| Writing | James Dearden | Screenplay |
| Directing | James Dearden | Director |
| Production | Suzanne Smith Crowley | Casting |
| Writing | Ira Levin | Novel |
| Production | Robert Lawrence | Producer |
| Camera | Mike Southon | Director of Photography |
| Editing | Michael Bradsell | Editor |
| Production | Billy Hopkins | Casting |
| Art | Jim Clay | Production Design |
| Art | Rod McClean | Art Direction |
| Production | Paul Raphael | Associate Producer |
| Art | Chris Seagers | Art Direction |
| Production | Eric Fellner | Executive Producer |
| Production | Chris Thompson | Associate Producer |
| Costume & Make-Up | Marit Allen | Costume Design |
| Art | Catherine Davis | Set Decoration |
| Crew | Eddie Powell | Stunts |
| Sound | Howard Shore | Original Music Composer |
| Crew | Mike Potter | Stunts |
| Costume & Make-Up | John Dods | Makeup Artist |
| Crew | Donna Evans | Stunts |
| Crew | G. A. Aguilar | Stunts |
| Crew | Greg Powell | Stunts |
| Crew | Martin Grace | Stunts |
| Crew | Helen Caldwell | Stunts |
| Crew | Graeme Crowther | Stunts |
| Crew | Tracey Eddon | Stunts |
| Crew | Jery Hewitt | Stunts |
| Crew | Cliff Cudney | Stunts |
| Crew | Hugh Aodh O'Brien | Stunts |
| Production | Mary Richards | Production Manager |
| Production | Suzanne Smith | Casting Associate |
| Directing | Patrick Clayton | First Assistant Director |
| Camera | Philip Sindall | Camera Operator |
| Sound | Ian Voigt | Sound Recordist |
| Sound | Campbell Askew | Sound Editor |
| Production | Bobbie Johnson | Production Accountant |
| Production | Tania Windsor | Production Coordinator |
| Production | Guy Tannahill | Location Manager |
| Production | Bill Darby | Assistant Location Manager |
| Directing | Tim Lewis | Second Assistant Director |
| Directing | Julia Waye | Third Assistant Director |
| Directing | Julie Robinson | Script Supervisor |
| Production | Tarn Harper | Assistant Accountant |
| Camera | Ian Jackson | Focus Puller |
| Camera | Mark Milsome | Clapper Loader |
| Camera | Malcolm Sheehan | Grip |
| Costume & Make-Up | Peter Frampton | Makeup Supervisor |
| Costume & Make-Up | Martin Samuel | Hairdresser |
| Costume & Make-Up | Sue Love | Hairdresser |
| Costume & Make-Up | Ken Crouch | Wardrobe Supervisor |
| Costume & Make-Up | Jo Korer | Wardrobe Master |
| Costume & Make-Up | Hilary Watson | Assistant Costume Designer |
| Art | Tessa Harrison | Assistant Art Director |
| Art | Stephenie McMillan | Set Dresser |
| Art | Jo Graysmark | Art Department Assistant |
| Crew | Susan d'Arcy | Unit Publicist |
| Camera | David Appleby | Still Photographer |
| Sound | Graham Sutton | Music Editor |
| Editing | Natalie Baker | Assistant Editor |
| Sound | Gerard McCann | Assistant Sound Editor |
| Sound | Kevin Brazier | Dialogue Editor |
| Sound | Robert Gavin | Assistant Dialogue Editor |
| Sound | John Hayward | Sound Mixer |
| Lighting | Micky Brown | Gaffer |
| Lighting | Bill Thornhill | Best Boy Electric |
| Art | Dave Reilly | Property Master |
| Art | Roy Evans | Construction Manager |
| Production | Melissa Wyn Griffith | Production Secretary |
| Directing | Diana Dill | Continuity |
| Sound | Howard Shore | Conductor |
| Sound | Homer Denison | Orchestrator |
