The Night of the Avaricious Actuary - S4-E11
Continuity mistake: The letter from the Cyclops Insurance Company that Gordon pulls out of his pocket is folded, wrinkled, and well-worn. In the close up of the same letter West reads, the letter is white, pristine, and not wrinkled or folded.
The Night of the Pistoleros - S4-E19
Continuity mistake: As West shoots it out with a bandito, the door jamb West uses for cover has a varying amount of bullet holes in it.
The Night of Miguelito's Revenge - S4-E12
Continuity mistake: The barber chair West sits in has dark wood arm rests, yet the close up of his hand as he is being chloroformed by Loveless shows white arm rests.
The Night of Miguelito's Revenge - S4-E12
Continuity mistake: As Jeremy Pike holds the glass of brandy, it changes position from being up to down, then up again.
The Night of the Janus - S4-E18
Continuity mistake: In the first boxcar scene, the train is shown standing among brown dirt and dead brush with the trees far off in the distant. When West opens the door to leave, there is a tree right in front of the door.
The Night of Miguelito's Revenge - S4-E12
Continuity mistake: When West and Pike pour a drink for "absent friend" Arte, the glass is placed between a newspaper and a silver dish. In the following close-up, the paper and dish have disappeared and the glass sits alone on the table. (00:49:50)
The Night of the Tycoons - S4-E23
Continuity mistake: In the last scene, there is close-up shot of the back of West's box car around dusk in the middle of dry brush. When Lionel opens the door to enter, the background is nighttime with a barely visible tree by the door.
The Night of the Tycoons - S4-E23
Continuity mistake: Three fourths into this episode, West fights several clowns in the bar. West's jacket becomes very dirty around his upper left chest and left knee areas. West runs through a nearby door into the hallway with completely clean clothes. As West is freeing Lionel, only the lower left knee is dirty; the jacket is still clean. The next full shot of West has the knee area clean.
The Night of the Tycoons - S4-E23
Continuity mistake: The first scene shows West riding into town wearing a blue shirt, a black kerchief, blue corduroy jacket with black leather lapels, black chaps, and a large belt buckle. After he gets off his horse to start walking, the next close-up of him walking shows him wearing a fancy blue vest, a blue neck piece, different blue jacket with blue lapels, and no chaps. West wears this for the remainder of the scene.
The Night of the Plague - S4-E24
Continuity mistake: The last scene shows the back of the boxcar amid dirt and brown/mustard colored short grass. When Ms. Averi Trent opens the door to meet her fiancé, we see a lush green tree by the door.
The Night of the Cossacks - S4-E22
Continuity mistake: A bit after midway through this episode, while in the cave, West, wearing a blue shirt, is rolled into a hole on the ground. After the fall, he is wearing a white shirt. There is a close-up of West reaching into his jacket for rope. The close-up shows West wearing a blue vest. He is wearing the white shirt (no vest) as he begins to climb out of the hole, but when he gets out of the hole he is wearing a blue shirt (no vest).
The Night of the Bleak Island - S4-E21
Continuity mistake: In the opening scene of the storm at sea, the first shot of the large boat shows it to have several windows in the front. When the boat docks, it is evident this is a smaller windowless boat.
The Night of the Pistoleros - S4-E19
Continuity mistake: West's close-up before the final scene in the boxcar shows his hair to be brushed back from the right to left and his hair looks full. The next shot in the boxcar, West's hair is distinctly parted on the left and is more flat looking.
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.
The Night of the Pistoleros - S4-E19
Continuity mistake: Towards the end of the first half of this show, the colonel and West are having a drink inside. Both men's clothes are spotless as they walk to the door to go outside. Once they go through the door, the colonel's jacket is noticeably dirty, especially on its right side. When West turns around from seeing Sgt. Tobin's body, the seat of West's pants is also quite dirty with a small tear in the middle of the seat of his pants. When West walks towards his horse to leave, the seat of his pants is spotless and the rip is gone.
The Night of the Sabatini Death - S4-E17
Continuity mistake: The first scene of West's train has it amid dead brown brush. When West opens the door to leave, two very green trees are on either side of the door.
The Night of the Winged Terror: Part 1 - S4-E15
Continuity mistake: Towards the end of this episode after the piñatas have exploded, West and Harper sit down to talk. Behind West to the left of the screen, only one blue and white piñata is hanging. The next shot of the two men talking shows three different piñatas hanging behind them.
The Night of the Winged Terror: Part 1 - S4-E15
Continuity mistake: Towards the beginning of this episode, the suit of armor is toppled to the floor. There is nothing between it and the wall. The next time we see the armor, there is a black and gold pedestal between the armor and wall.