The Night of the Bottomless Pit - S2-E8
Continuity mistake: When they attack him, Artemus' cellmates are smacked with a wooden chair, which lands broken but upright on the floor. In the very next shot, though, as Artie throws the exploding cigar, the chair is suddenly lying on its side. (00:25:30)
The Night of the Bottomless Pit - S2-E8
Continuity mistake: While interviewing West, Commandant Mauvais removes his white gloves. But after a quick cut away to West, the gloves are back on again. (00:07:30)
The Night of the Bottomless Pit - S2-E8
Continuity mistake: After Artemus' entrance, Mauvais' left glove disappears and reappears repeatedly as he pours and drinks his wine from the red glass. (00:24:15)
The Night of the Poisonous Posey - S2-E7
Revealing mistake: The rectangular openings from which the knives thrown at West will actually emerge are visible on the door behind him. After the knives "land," the rectangles disappear. (00:18:50)
The Night of the Poisonous Posey - S2-E7
Factual error: Brutus fires his rifle at West more than a dozen times without once reloading. And he's not carrying anything in which he could store ammunition anyway. (00:43:20)
The Night of the Poisonous Posey - S2-E7
Continuity mistake: In the funeral parlor, West is standing with his back to a wooden door. The shot cuts away briefly, then back, and now there's a blue wall behind him. Cut again, and the door is back. (00:19:05)
The Night of the Poisonous Posey - S2-E7
Revealing mistake: West and Gordon are supposedly hiding in opposite corners of the ice house, yet each actor is crouching in the same area with the exact same blocks of plastic ice surrounding him. (00:40:30)
The Night of the Big Blast - S2-E4
Continuity mistake: While Artemus talks to Lily at her dining table, he clasps his hands behind his back and is standing up straight. When the shot cuts, he's suddenly leaning forward with his left arm extended to the table. (00:11:25)
The Night of the Raven - S2-E3
Continuity mistake: In the reverse angle shot of West's table, the plates, candles and red table cloth are all there - but the huge dish of butter has disappeared. (00:39:20)
The Night of the Raven - S2-E3
Continuity mistake: Because the second one is a painted backdrop, the building across the street from the sheriff's office in the exterior shots looks nothing like the one we can see from inside the office in the next scene. (00:07:00)
The Night of the Eccentrics - S2-E1
Visible crew/equipment: When the Eccentrics outline their nefarious plan to assassinate Juarez, the boom mike shadow is moving on the door behind West and Gordon. (00:28:30)
The Night of the Eccentrics - S2-E1
Revealing mistake: Tony throws two knives at West - but on the wall where the knives hit, the rectangular openings from which the blades actually emerge are delineated beforehand. Happens again a few scenes later, where slots cut in the door are already there before the knives are thrown. [Spoiler: It's inconsequential to the "revealing" error, but if you play the scene in slow motion, you can see that both times, the knives pop through from the back of the "wall." This is also how the carnival trick is performed.] (00:17:05)
The Night of the Brain - S2-E21
Revealing mistake: Mr. Braine fires a mini-rocket at Brendage, killing him. But a poor camera angle reveals the explosive charge going off in the wall more than two feet to Brendage's left. From the angle at which it was fired, the rocket couldn't possibly have hit him. (00:21:45)
The Night of the Puppeteer - S1-E21
Revealing mistake: Just before she dances away, the life-size ballerina "puppet" fails to hold her fixed stare and blinks. (00:20:00)
The Night of the Man-Eating House - S2-E12
Continuity mistake: West and Gordon drag Day from the haunted house, prop him on the porch and turn away. When they turn back, they're stunned to see that he's aged 30 years. But if you look closely, you can see that the man they prop on the porch is already gray-bearded and shaggy. So why were they surprised? (00:44:30)
The Night of the Vicious Valentine - S2-E20
Continuity mistake: The mannequin arms holding West to Emma Valentine's chair keep changing positions between shots.
The Night of the Flying Pie Plate - S2-E6
Revealing mistake: When the townspeople spill out onto the town's streets after hearing the noise from the sky, the horses tied at the hitching posts never move nor flinch through the entire scene and are all in the same pose, indicating the horses are props and not real.
The Night of the Amnesiac - S3-E22
Continuity mistake: When amnesiac West emerges from between the buildings, it is dark outside, but when he encounters the cowboy assaulting the woman, it is now suddenly broad daylight.
The Night of the Skulls - S2-E13
Factual error: This episode suggests that the presidential order of succession is Vice-President, Secretary of State, then President Pro-Tem of the Senate. It's actually the Vice-President, then Speaker of the House, then President Pro-Tem of the Senate.
The Night of the Colonel's Ghost - S2-E24
Continuity mistake: The opening scene of this episode shows the train moving at twilight. West and Gordon are looking out the window, and it is pitch black. Right before West goes outside, the camera shot of the train wheel shows light (either twilight or moonlight) on the wheel. The very next scene has West with the train door open, and it is pitch black outside. (00:00:05 - 00:00:35)