The Night of the Diva - S4-E20
Continuity mistake: In the first scene, the close-up of the train entering the town shows the number 22 and is not painted as West's train is. However, when West enters the box car from the town's train depot, it is his box car. Also, as West enters the boxcar, the backdrop of the outside is not of the train depot but looks more like solid brown paneling.
The Night of the Diva - S4-E20
Continuity mistake: The close-up of the stationary boxcar midway through this episode shows it amid dirt and brown low brush. When the young lady enters, one can see a very green tree immediately outside the door.
The Night of the Diva - S4-E20
Continuity mistake: In the next to the last scene of this show, West removes the mask of the fallen villain - this reveals a woman with long brown flowing hair. However, in all the shots before, this villain had a short haircut.