The Night of the Vipers - S3-E18
Continuity mistake: Midway through this episode as West is ascending the outside wooden steps to Moriarty's office, his shirt has a vertical rip in his upper left chest area. Once West goes inside, that rip is no longer there but is replaced by a much larger vertical rip (much lower from his waist up to his chest). This larger rip is seen throughout this scene. When West leaves Moriarty's office, the larger rip is no longer there and the original smaller higher rip re-appears. In the following scene when West is changing his shirt, the smaller upper rip has been replaced by the much larger lower vertical rip.
The Night of the Vipers - S3-E18
Continuity mistake: As the boxing match moves from inside to outdoors, West's shirt is drenched on the back, as well as around the collar and top front of the shirt. Outdoors, those areas are dry. When the fight moves by the water, West shirt is torn on his front left (length from the 2nd to 4th buttons). At the end of that scene, that tear no longer shows, but a new one appears much higher (length from 1st to 2nd buttons) and is closer to his arm in the upper left chest area.
The Night of the Vipers - S3-E18
Continuity mistake: Before the title appears for this episode, in a long screen shot, West is knocked out face-up with both arms extended above his head; only his left elbow is touching the knocked out bad guy next to him. The next immediate close-up shot of West shows West with only his right arm extended above his head and his body is much closer next to the bad guy. As the title appears, West is face-down resting on his right arm when he starts to regain consciousness.
The Night That Terror Stalked the Town - S1-E10
Continuity mistake: When Dr. Loveless records his and West's conversation, West says "You belong in jail." When Dr. Loveless plays the recording for Janus in a subsequent scene, West says "Jail is where you belong." (00:14:05 - 00:16:40)
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 Miguelito's Revenge - S4-E12
Continuity mistake: Loveless' goon holds his gun at a high angle to Pike's head, but the next shot shows the gun at a much lower angle.
The Night of Miguelito's Revenge - S4-E12
Continuity mistake: The pencil on Barlow's desk disappears in the view over Barlow's right shoulder, then appears when seen over Pike's left shoulder as the scene switches back and forth.
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 Fire and Brimstone - S4-E9
Continuity mistake: After West shoots the mine wall with the grappling arrow, the line connected to the arrow is taut. The quick shot back to West shows the line loose with lots of slack, then cuts back to the arrow and the line is taut.
The Night of the Fugitives - S4-E7
Continuity mistake: West uses a chandelier to knock down a thug wearing a brown vest against the opposite wall in the Saloon. When West gets up, the thug is now lying next to West and wears a green vest rather than brown, and is also closer to the Saloon's bar.
The Night of the Fugitives - S4-E7
Continuity mistake: David Desmond's cigar instantly changes from being elevated in the facial close ups to being at a lower angle in the shots from behind his right shoulder.
The Night of the Fugitives - S4-E7
Continuity mistake: Monk sees West in a mirror escaping from behind the hotel's door. The immediate next shot shows West escaping again.
The Night of the Kraken - S4-E6
Continuity mistake: When Jose' Aguila pulls down the net, he is in front of the bar. The next shot he is instantly punching a bad guy in front of a window, which is several yards from where he was at the bar.
The Night of the Kraken - S4-E6
Continuity mistake: During the bar fight, Aguila and the goons he is fighting disappear from the scene, showing only West fighting some bad guys. Instantly Aguila appears in the exact same area where West was fighting.
The Night of the Kraken - S4-E6
Continuity mistake: While struggling under water with the kraken, West surfaces, then the next shot shows West deep underwater and breaking the surface again.
The Night of the Watery Death - S2-E9
Continuity mistake: The knife West uses to throw at the button to turn off the disintegration machine is already embedded in the button before he throws it.