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 Montezuma's Hordes - S3-E8
Continuity mistake: West has a different hairstyle as it is parted down the middle when he is fighting outside the Nugget Saloon. In the inside fight and throughout this episode, there is no part in his hair - with the only exception of this outside fight. (00:13:30)
The Night of the Glowing Corpse - S1-E7
Continuity mistake: Near the end of the episode when West walks into the mansion where the meeting is behind held, just as he enters, Lt. Armand Renard can be seen talking to Artemus at the bottom of the staircase, but Renard died earlier in the episode. They obviously filmed this scene at the same time as the first scene, but missed that continuity error in the editing. (00:46:40)
The Night of the Raven - S2-E3
Continuity mistake: Dr. Loveless' henchmen remove Artemus' leg chain. But a few scenes later, he's shown asleep in a chair, and the chain is back around his ankle. (00:28:35)
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 Raven - S2-E3
Revealing mistake: When the marshal opens the train's rear door and comes in to arrest Lana, you can see wrinkles in the "sky" outside. It's really a painted cloth backdrop. (00:48:40)
The Night of the Underground Terror - S3-E19
Factual error: The episode opens in New Orleans during Mardi Gras, circa approximately 1873. We hear a jazz band playing "When The Saints Go Marching In" although the song didn't emerge in a recognizable form until the end of the 19th century. (00:00:19)
The Night of the Turncoat - S3-E13
Visible crew/equipment: As West is swimming in the water tank that is filled with dangerous sea creatures (Hammerhead sharks, etc.) a modern day (1960's) frogman is swimming behind West in the tank.
The Night of the Skulls - S2-E13
Revealing mistake: In the livery stable fight scene between Gordon and Tigo, the tines of the pitchfork Tigo threatens Gordon with wobble, indicating they are made of rubber or a soft material and not metal.
The Night of the Gruesome Games - S4-E5
Revealing mistake: Just before Doctor Raker gets to the cliff before falling, there is a jet airliner seen in the sky just over his right shoulder.
The Night of the Underground Terror - S3-E19
Revealing mistake: After West shoots Major Hazard on the water tower, the falling stuntman lands on a safety cushion that is about a half foot below the ground surface. Further, the next scene cut shows Major Hazard being covered by the tower contents, but Hazard is now lying on the ground surface, not below it like the stuntman.
The Night of the Amnesiac - S3-E22
Continuity mistake: As Gordon interrogates Crotty, Crotty raises his cigar to his face twice.
The Night of the Vipers - S3-E18
Revealing mistake: The final gun battle in town has a gunman in a tower shooting at West. The gunman's perch is enclosed on all four sides by a bannister, but when West returns fire, shooting the gunman out of the tower, the bannister in front of the gunman has disappeared, allowing the stuntman a clear path to fall out of it.
The Night of the Vipers - S3-E18
Revealing mistake: After West shoots the gunman in the tower, the gunman launches himself clear of the tower, rather than merely collapsing and then falling.
The Night of the Legion of Death - S3-E12
Revealing mistake: The scar makeup on Montgomery's face begins peeling off as he is giving his speech.
The Night of the Legion of Death - S3-E12
Continuity mistake: West and Gordon are being chased by members of the Legion, who wear green uniforms and black hats, but the stock footage of the chase shows the blue uniforms of regular U.S. Cavalry troopers.
The Night of the Legion of Death - S3-E12
Continuity mistake: The stock footage of West and Gordon being chased in the wagon by the Legion soldiers shows eight troopers, but other scenes show only four.
The Night of the Legion of Death - S3-E12
Continuity mistake: West sprinkles a thin line of powder into a circular shape surrounding him, but before the powder ignites and burns through the floor, it is thicker and has a wider circumference.
The Night of the Legion of Death - S3-E12
Continuity mistake: The stock footage of the wagon West is driving has a large opening in the front of the canopy as he is being chase down by the horsemen, but the close ups of West driving show a much smaller canopy on the wagon.
The Night of the Legion of Death - S3-E12
Continuity mistake: Stock footage of the wagon West drives to escape the horsemen shows a team of four horses, but the closer scenes show a team of only two horses pulling the wagon.