 James Earp, who was the first to die in the story, actually lived until 1926.The key women in Wyatt's and Doc's lives—Wyatt's common law wife Josephine and Doc's common-law wife Big Nose Kate—were not present in Lake's original story and were kept out of the movie as well.The film gives the date of the gunfight as 1882 when it actually occurred in 1881.