Continuity mistake: After Evans was shot near the end of the movie, Ben Wade jumped out of the train to look at him. If you look over Wade's shoulder, you will see that Nez (the Apache) had already arrived at his spot, and Campos (the Mexican sharpshooter) threw Wade's gun belt to Charlie Prince. After the movie cut a couple of times, Nez was shown walking up, throwing Wade's gun belt to Campos, who then threw it to Charlie Prince.
Factual error: Although the movie was set a few years after the Civil War, the train was equipped with modern automatic couplers.
Plot hole: In the bedroom scene before Dan Evans leaves his family, there are two petroleum lamps attached to the wall and lit up although there is still daylight. Given their financial distress, they would have never done anything like this. Moreover, the light is not flickering because the film crew used light bulbs.Thomas Brillisauer
Ben Wade: They're gonna kill you and your father, William. They're gonna laugh while they do it. I think you know that.
William Evans: Call 'em off.
Ben Wade: Why should I?
William Evans: Because you're not all bad.
Ben Wade: Yes, I am.
William Evans: You saved us from those Indians.
Ben Wade: I saved myself.
William Evans: You got us through the tunnels. You helped us get away.
Ben Wade: If I had a gun in them tunnels, I would have used it on you.
William Evans: I don't believe you.
Ben Wade: Kid, I wouldn't last five minutes leading an outfit like that if I wasn't as rotten as hell.
Ben Wade: Well, would you look at all this? You all spared no expense this time, Byron. I gotta say, though, it's probably cheaper just to let me rob the damn thing.