Révélant des erreurs: When John and Harley are crossing the railroad tracks to see the Cheyenne Social Club for the first time, it is apparent from the camera angle that the last structure on the right is only a facade with no building behind it.
Erreurs dans la géographie: There are no mountains in the immediate vicinity of Cheyenne, Wyoming.
Continuité: In the last scene, when John receives a letter while working a cattle roundup, the letter is sealed when it's handed to him, but when he takes off his work glove to take the letter out of the envelope and read it, the flap is unsealed, as if it never had been sealed at all.
Continuité: As John and Harley sit at the table waiting for their steaks after the gunfight, John pours Harley then himself a whiskey, the color of the which is pale. When John talks to the Marshal moments later, he holds up his glass, and the whiskey is a shade darker. In the next shot of John and Harley, John's whiskey is back to its original color.