The Night of the Big Blackmail - S4-E1
Continuity mistake: Before and after the first freeze frame, West's hair is combed from the right side to left. During the next scene when West's hat comes off during the fight, his hair is combed from the left side. In the next scene in the boxcar, his hair is back to being combed from the right. In the last scene of this episode when West is in the boxcar, he has a completely different hair cut. It is much shorter than in the previous scene, very flat looking, and is parted on the left. This last shot makes Mr. West appear to have a receding hairline.
The Night of the Juggernaut - S4-E3
Continuity mistake: In the last scene right before West walks into the boxcar, the front of the train shows the number 16, and the square area around the front light is grey with swirl designs above and below the light. At the end of this scene, the last shot is of the front of the train, and it is showing the number 8 with the square area around the front light is red.
The Night of the Kraken - S4-E6
Continuity mistake: The first time we see the bartender, he has a rip in his shirt on the back side under his right shoulder blade. In all the other scenes, the rip no longer shows.
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 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 Egyptian Queen - S4-E8
Continuity mistake: The first shot of West's eyes, after the opening credits, shows them to be a bit different than usual - as if they had an allergic reaction to something. The second, third, and fourth shots show the eyes back to normal, but the shot of him walking the princess to the door shows a very puffy faced West. After walking her to the door when he turns around, West is back to looking like his typical self for the rest of this episode.
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 Camera - S4-E10
Continuity mistake: When West finds the half poker chip, he moves to place it in his left outside vest pocket with his left hand, but the next shot shows him placing the chip into the inside left pocket of the vest with his right hand.
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 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 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 Miguelito's Revenge - S4-E12
Continuity mistake: In the scene before the third freeze frame, a large coffin-like rectangular object slides into the water. West is inside this structure. All sides are completely flat. We see the object under water sinking. This one is much shorter, has an oval window, and the side is not completely flat when compared to the one that enters the water. After the freeze frame, West is sitting up with his legs completely extended. The dimensions of this under water container would have to have height and width much longer than the other two containers that have been shown.
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.
