Hour of the Gun accuracy than most motion picture accounts of the events and is based on the non-fiction book "Tombstone's Epitaph" by Douglas D. Martin, with a screenplay by Edward Anhalt. In "Hour of the Gun" Ike Clanton is shown, correctly, to have survived the Gunfight at the O.K. Corral, whereas previous films had him killed at the gunfight. Outnumbered but determined, Wyatt Earp (James Garner), his brothers Virgil (Frank Converse) and Morgan (Sam Melville) and ally Doc Holliday (Jason Robards) confront and clearly get the best of the Ike Clanton gang in a violent shootout at the O.K. Corral in the Arizona
Hour of the Gun not only survives the gunfight, but is a major antagonist thereafter. Where "Gunfight at the O.K. Corral" is more about the main gun battle, this film begins with the gunfight and moves forward from there. Because Hal B. Wallis had scripted everything in the earlier "Gunfight at the O.K. Corral", Sturges was disappointed with that film. "Hour of the Gun" is more of a psychological "melancholy character study". James Garner also played the lead as Wyatt Earp in a different movie filmed more than two decades later, Blake Edwards's "Sunset" (1988), a comedy thriller based on the 1920s period during