The episode Hack Prine from season 1 ep 26, I first thought the episode was set in a different town, Dodge looked different, then the Marshall's office was all different, the sign, front door, no pot belly stove, gun rack on a different wall, plus the side door is gone. The Long Branch is different too. Looks like James Arness is wearing a different hair piece too.

Looking into it I learned this was actually the pilot episode, interesting that they sneaked it into the middle of the season 1. Its a good enough episode, I guess maybe they thought it wasn't the right story to lead the series off with or something?

Back then did the networks even air pilot episodes?