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.
| Writing | Edward Anhalt | Writer |
| Directing | John Sturges | Director |
| Art | Alfred Ybarra | Art Direction |
| Production | John Sturges | Producer |
| Sound | Jerry Goldsmith | Original Music Composer |
| Camera | Lucien Ballard | Director of Photography |
| Editing | Ferris Webster | Editor |
| Art | Rafael Suárez | Set Decoration |
| Production | Lynn Stalmaster | Casting |
| Production | Allen K. Wood | Production Supervisor |
| Directing | Thomas J. Schmidt | Assistant Director |
| Directing | John Franco | Script Supervisor |
| Sound | Jesús González Gancy | Sound |
| Art | Joe LaBella | Property Master |
| Crew | Sass Bedig | Special Effects |
| Editing | Jorge Azcárate | Assistant Editor |
| Sound | Frank E. Warner | Sound Effects Editor |
| Art | William Maldonado | Construction Coordinator |
| Production | Jack Lacey | Unit Production Manager |
| Costume & Make-Up | Charles Blackman | Makeup Artist |
| Production | Nate H. Edwards | Production Manager |
| Sound | Richard Carruth | Music Editor |
