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 |
| Art | Claude E. Carpenter | Set Decoration |
| Production | Elliott Kastner | Producer |
| Art | Alfred Sweeney | Art Direction |
| Camera | Conrad L. Hall | Director of Photography |
| Editing | Stefan Arnsten | Editor |
| Sound | Frank Regula | Boom Operator |
| Crew | Paul Baxley | Stunt Coordinator |
| Production | Jerry Gershwin | Producer |
| Directing | James H. Brown | Assistant Director |
| Art | Wayne Fitzgerald | Title Designer |
| Sound | Stanley Jones | Sound |
| Production | Chuck Hansen | Unit Manager |
| Costume & Make-Up | Jean Burt Reilly | Hair Supervisor |
| Sound | Johnny Mandel | Original Music Composer |
| Costume & Make-Up | Gordon Bau | Makeup Supervisor |
| Art | Tyrus Wong | Art Department Coordinator |
| Crew | Joe Pronto | Stunts |
| Crew | Tom Steele | Stunts |
| Crew | James Turley | Stunts |
| Crew | Sam A. Mides | Stunts |
| Crew | Ann Pat Kelly | Stunts |
| Crew | Dick Crockett | Stunts |
| Crew | Jerry Summers | Stunts |
| Crew | Sol Gorss | Stunts |
| Crew | Herb Pacheco | Stunts |
| Crew | Morton C. Thompson | Stunts |
| Crew | Paul Baxley | Stunt Double |
| Crew | Harvey Parry | Stunts |
| Crew | Paul Baxley | Stunts |
| Crew | Bill Shannon | Stunts |
| Crew | Jim Sheppard | Stunts |
| Crew | Gene Coogan | Stunts |
| Crew | Bob Herron | Stunts |
| Sound | Dan Wallin | Scoring Mixer |
| Crew | Bert Steinberg | Dialogue Coach |
| Camera | Richard Doran | First Assistant Camera |
| Camera | Kenneth B. Taylor | Grip |
| Camera | Jordan Cronenweth | Assistant Camera |
| Sound | Willis Holman | Orchestrator |
| Sound | Johnny Mandel | Conductor |
| Camera | Jordan Cronenweth | Camera Operator |
| Camera | Richard Moore | Camera Operator |
| Crew | Ron Veto | Stunts |
