The Night of Miguelito's Revenge - S4-E12
Continuity mistake: A man and woman walking in the background as Pike is being gassed are about to cross the street at a corner. As Pike is being lifted into the carriage, the same couple are just about to approach the same corner.
The Night of Miguelito's Revenge - S4-E12
Revealing mistake: The steam-driven robot controlled by Dr. Loveless blinks as he is strangling West.
The Night of the Pelican - S4-E13
Revealing mistake: Towards the end of the episode when rocket one is fired, it launches very, very slowly with little force/velocity - obviously a prop.
The Night of the Pelican - S4-E13
Continuity mistake: Near the end of this episode, a rocket is fired at the ship. When it explodes near the ship, it is never seen soaring towards the ship to explode.
The Night of the Pelican - S4-E13
Deliberate mistake: After Jeremy Pike drops the box in front of the firing squad and it begins to emit smoke, the wind blows the smoke to the right. The actors playing the soldiers in the firing squad then move themselves into the smoke and begin coughing and choking from it.
The Night of the Spanish Curse - S4-E14
Continuity mistake: The last shot before the opening credits, West is knocked out face down with his head resting on this right hand which is on top of his left hand. The very next shot shows West's head resting on his right arm and his left arm is folded underneath his chest.
The Night of the Spanish Curse - S4-E14
Other mistake: Very close to the end of this episode during the fight scene, West and Gordon throw a guy directly into the camera - causing the shot to become unfocused and shaky.
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.
The Night of the Winged Terror: Part 1 - S4-E15
Continuity mistake: Footage of the train rolling into town shows two different locomotives.
The Night of the Winged Terror: Part 1 - S4-E15
Continuity mistake: A townsman in a brown poncho and sombrero almost walks out of the scene in the long shot, but is shown entering the scene and passing Laurette in the close up shot.
The Night of the Winged Terror: Part 1 - S4-E15
Continuity mistake: West's hands change positions as he speaks with Frank Harper. In the front shots West's hands are up, but from his back West's hands are down.
The Night of the Winged Terror: Part 1 - S4-E15
Continuity mistake: The piñata lands and explodes at Harper's left, but when he gets up, the piñata's exploded remains are several feet to his right.
The Night of the Winged Terror: Part 1 - S4-E15
Continuity mistake: The exploding piñatas are blown to pieces in the attacks on West and Harper, but later Harper picks up one of the piñatas, which is intact.
The Night of the Winged Terror: Part 1 - S4-E15
Revealing mistake: West's fist does not connect with the face of one of the Brass brothers he punches.
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 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 the Janus - S4-E18
Revealing mistake: About half way through this episode, the hooded man West is chasing goes through double doors and closes them. West slams his body to open the doors. He steps back to ram his body into the doors again to force them open. Before he does, we see the doors sort of slightly move back and forth (this looks very odd and unnatural) before West slams them open.
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 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.