Marshal Wyatt Earp kills a couple of men of the Clanton-gang in a fight. In revenge Clanton's thugs kill the marshal's brother. Thus, Wyatt Earp starts to chase the killers together with his friend Doc Holliday.
Unfortunately the movie Hour of the Gun is not yet available on HBO Max.
| Directing | John Sturges | Director |
| Writing | Edward Anhalt | Writer |
| Production | John Sturges | Producer |
| Sound | Jerry Goldsmith | Original Music Composer |
| Camera | Lucien Ballard | Director of Photography |
| Editing | Ferris Webster | Editor |
| Art | Alfred Ybarra | Art Direction |
| Art | Rafael Suárez | Set Decoration |
| Production | Lynn Stalmaster | Casting |
| Directing | Thomas J. Schmidt | Assistant Director |
| Sound | Jesús González Gancy | Sound |
| Directing | John Franco | Script Supervisor |
| Art | Joe LaBella | Property Master |
| Production | Allen K. Wood | Production Supervisor |
| Production | Nate H. Edwards | Production Manager |
| Production | Jack Lacey | Unit Production Manager |
| Costume & Make-Up | Charles Blackman | Makeup Artist |
| Sound | Richard Carruth | Music Editor |
| Crew | Sass Bedig | Special Effects |
| Editing | Jorge Azcárate | Assistant Editor |
| Sound | Frank E. Warner | Sound Effects Editor |
| Art | William Maldonado | Construction Coordinator |
