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
Gunfight at the O.K. Corral started shooting first is not certain; accounts by both participants and eyewitnesses are contradictory. The smoke from the black powder used in the weapons added to the confusion of the gunfight in the narrow space. Those loyal to one side or the other told conflicting stories, and independent eyewitnesses who did not know the participants by sight were unable to say for certain who shot first. The six or seven men with guns fired about 30 shots in around 30 seconds. Virgil Earp reported afterward, "Two shots went off right together. Billy Clanton's was one of them." Wyatt testified, "Billy