Privé-detective Harper krijgt de opdracht de verdwenen miljonair Sampson op te sporen. Ettelijke klappen en lijken later brengt Harper de waarheid boven water. Tussen de bedrijven door kampt Harper met privé-problemen, hij moet kiezen tussen zijn vrouw en zijn beroep.
Nee, helaas is Harper nog niet beschikbaar op Netflix in Nederland.
| Directing | Jack Smight | Director |
| Writing | William Goldman | Screenplay |
| Writing | Ross Macdonald | Novel |
| Production | Jerry Gershwin | Producer |
| Production | Elliott Kastner | Producer |
| Camera | Conrad L. Hall | Director of Photography |
| Editing | Stefan Arnsten | Editor |
| Art | Alfred Sweeney | Art Direction |
| Art | Claude E. Carpenter | Set Decoration |
| Directing | James H. Brown | Assistant Director |
| Sound | Frank Regula | Boom Operator |
| Crew | Paul Baxley | Stunt Coordinator |
| Art | Wayne Fitzgerald | Title Designer |
| Sound | Johnny Mandel | Original Music Composer |
| Costume & Make-Up | Gordon Bau | Makeup Supervisor |
| Costume & Make-Up | Jean Burt Reilly | Hair Supervisor |
| Production | Chuck Hansen | Unit Manager |
| Sound | Stanley Jones | Sound |
| Art | Tyrus Wong | Art Department Coordinator |
| Crew | Paul Baxley | Stunt Double |
| Crew | Paul Baxley | Stunts |
| Crew | Gene Coogan | Stunts |
| Crew | Dick Crockett | Stunts |
| Crew | Sol Gorss | Stunts |
| Crew | Bob Herron | Stunts |
| Crew | Ann Pat Kelly | Stunts |
| Crew | Sam A. Mides | Stunts |
| Crew | Herb Pacheco | Stunts |
| Crew | Harvey Parry | Stunts |
| Crew | Joe Pronto | Stunts |
| Crew | Bill Shannon | Stunts |
| Crew | Jim Sheppard | Stunts |
| Crew | Tom Steele | Stunts |
| Crew | Jerry Summers | Stunts |
| Crew | Morton C. Thompson | Stunts |
| Crew | James Turley | Stunts |
| Crew | Ron Veto | Stunts |
| Camera | Jordan Cronenweth | Assistant Camera |
| Camera | Jordan Cronenweth | Camera Operator |
| Camera | Richard Doran | First Assistant Camera |
| Camera | Richard Moore | Camera Operator |
| Camera | Kenneth B. Taylor | Grip |
| Sound | Willis Holman | Orchestrator |
| Sound | Johnny Mandel | Conductor |
| Sound | Dan Wallin | Scoring Mixer |
| Crew | Bert Steinberg | Dialogue Coach |
