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 In the following scene when West is changing his shirt, the smaller upper rip has been replaced by the much larger lower vertical rip.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 of the Underground Terror - S3-E19
Continuity mistake: After the third freeze frame, there is an outside fight. West has a major rip in his pants on the left inner seam from the knee to almost his waist - showing his white underwear during the fight. After the camera shot to Gordon and then back to West, his pants are now miraculously mended in the front and inner left leg area with a new large rip on the pant outer right seam from the knee to upper thigh.
The Night of the Undead - S3-E21
Continuity mistake: Towards the end of this episode, West crashes through a window and tears his right upper sleeve directly below the shoulder. When he exits the door into the cave and meets Gordon, the rip is no longer there.
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 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 Amnesiac - S3-E22
Continuity mistake: In the opening scene, West is shot and falls off the stage coach. He falls to the ground with both arms stretched out horizontally. As the stage coach leaves, his left arm is positioned along side his body. One of the villains throws West's hat, and it lodges between his left hand and body. When West is found unconscious, the hat is resting on his left shoulder.
The Night of the Death-Maker - S3-E24
Continuity mistake: Towards the end of this episode when West gets into the casket, the width of the head area is wider than the foot area of the casket. There are only two circular hand grips on a side. When the two monks are carrying it to the furnace, the casket is symmetrically shaped with the head and foot areas being the same width, and there are three round hand grips on the side. Right before the third freeze frame when the monks are in front of the furnace, the casket is back to the original shape with the head area wider than the foot area.