Deathtown

Jarrod Barkley goes to Baker City to close a land deal with three brothers from Mexico, but he's lied to, told they came and went. First he is curious, then suspicious, then he finds out what really happened to them, except the reason he's given for it turns out not to be true either. Wounded and bedraggled after riding for more than 50 miles after other men, he finds out even more isn't true. Twists and turns all the way to the end.

I'm a little disappointed that a couple commenters find the episode "politically correct." It was actually correct in that Mexicans were unjustly lynched, just as many other people were. Richard Long (Jarrod) had a good reference for finding out actual history of the US West - his brother was a professor of the subject at SMU. Historical accuracy seems to be something some people can't swallow, or at least don't want to see it on TV episodes.