De voormalige scout Jess Remsberg redt de jonge Ellen Grange uit handen van vijandige Apachen. Hij brengt haar vervolgens terug naar haar man Willard Grange, die echter meer belang blijkt te hechten aan zijn paarden dan zijn vrouw. Bij thuiskomst ontdekt Jess dat zijn eigen vrouw, een Comanche, door onbekenden is vermoord.
Nee, helaas is Duel at Diablo nog niet beschikbaar op Netflix in Nederland.
| Writing | Marvin H. Albert | Novel |
| Directing | Ralph Nelson | Director |
| Sound | Neal Hefti | Original Music Composer |
| Art | Alfred Ybarra | Art Direction |
| Editing | Fredric Steinkamp | Editor |
| Art | Victor A. Gangelin | Set Decoration |
| Production | Fred Engel | Producer |
| Production | Ralph Nelson | Producer |
| Camera | Charles F. Wheeler | Director of Photography |
| Writing | Michael M. Grilikhes | Screenplay |
| Crew | Roscoe Cline | Special Effects |
| Costume & Make-Up | Eddie Armand | Wardrobe Designer |
| Production | J. Paul Popkin | Production Supervisor |
| Sound | Richard Carruth | Music Editor |
| Directing | Phil Cook | Assistant Director |
| Directing | Emmett Emerson | Assistant Director |
| Costume & Make-Up | Gustaf Norin | Makeup Artist |
| Costume & Make-Up | Yvonne Wood | Costume Design |
| Editing | Allan Jacobs | Assistant Editor |
| Crew | Al Wyatt Sr. | Stunt Coordinator |
| Production | James Garner | Producer |
| Crew | Bobby Somers | Stunts |
| Crew | Neil Summers | Stunts |
| Crew | Boyd 'Red' Morgan | Stunts |
| Crew | Glenn Randall Jr. | Stunts |
| Crew | John Daheim | Stunts |
| Crew | Bobby Somers | Stunt Double |
| Crew | Richard Farnsworth | Stunts |
| Crew | Steve DeFrance | Stunts |
| Crew | Joe Finnegan | Stunts |
| Crew | Leroy Johnson | Stunts |
| Crew | Roydon Clark | Stunts |
| Crew | Rodd Wolff | Stunts |
| Writing | Marvin H. Albert | Screenplay |
| Crew | Bill Hart | Stunts |
| Sound | Jerry Whittington | Sound Effects Editor |
