Revealing mistake: After he's ambushed and killed in the alley, the "dead" sheriff can be seen breathing quite healthily.
Continuity mistake: Bart's coat gets covered with dust during the fistfight in the cabin. But in the next shot, he runs outside and the coat is completely clean again. (00:47:00)
Continuity mistake: In the opening scene, rear-screen projection footage behind the stagecoach shows a landscape covered with trees. When Crippen points out the mountains, we see an expanse of completely treeless desert. In the next shot, the trees have returned.
The Town That Wasn't There - S4-E3
Continuity mistake: John Astin, playing a homely sheep farmer, wears a large fake nose throughout the episode. But in the saloon meeting scene, where Beau introduces him to the townsfolk, the nose is conspicuously missing.
The Devil's Necklace: Part 1 - S4-E31
Revealing mistake: Bart teaches Tawney how to wash her face with a bar of soap. When he dries her cheek, the actress' heavy "Indian" make-up is wiped away, revealing a very white complexion. The white patch disappears in the next shot. (00:45:00)
