The Night of the Brain - S2-E21
Other mistake: Throughout this episode Gordon keeps producing orange-sized smoke bombs, but he has no pockets in his clothing large enough for all of them and if he did, the size of the bombs would be obvious in his clothing.
The Night of the Deadly Bubble - S2-E22
Continuity mistake: This scene opens showing the personal train car at twilight. When West opens the door to leave (one minute and 10 seconds later), it is pitch black outside. (00:06:15 - 00:07:25)
The Night of the Deadly Bubble - S2-E22
Continuity mistake: When West and Dr. Pringle back up to the steel door to escape, West is about three feet in front of it. One of the villain's henchmen bursts in, saying, "hold it." The next shot and West is about eight feet away from the door and the henchman.
The Night of the Deadly Bubble - S2-E22
Continuity mistake: Dr. Pringle and West back up to a steel door to escape from the room and West is behind a table with lab equipment on it. A henchman charges in, gun drawn on West. The next instant shot shows the table has moved several feet to the viewer's left, presumably to make room for the impending fist fight West will have with the bad guys.
The Night of the Surreal McCoy - S2-E23
Continuity mistake: During the fight, the candle on the left tilts to the left. Next shot, it is perfectly vertical. West knocks a thug into the bureau, and left candlestick tilts to the right. After the fight is done when West is opening the door for Gordon, the candle is inexplicably on the floor. (00:12:45)
The Night of the Surreal McCoy - S2-E23
Continuity mistake: The second thug to be knocked-out is on the floor (to the left of screen) and has fallen on his left-side with his left leg slightly bent, and his right leg cannot be seen. When Gordon enters the room, this unconscious thug is now positioned face down, arms extended over his head, and both legs stretched out. (00:12:55)
The Night of the Surreal McCoy - S2-E23
Continuity mistake: The last thug to be knocked-out is on the floor by the fireplace with his body at an angle to it. When Gordon enters the room, this unconscious thug is closer to the fireplace, and his body has changed position to be parallel to it. (00:12:55)
The Night of the Surreal McCoy - S2-E23
Continuity mistake: West enters the portrait and is stretched out on his back on the ground. As he is walking to the saloon, his entire backside of his suit is covered in dirt. West becomes dizzy, and as he is falling to the ground, face first, we see that the entire back side of his suit is clean. (00:35:50)
The Night of the Surreal McCoy - S2-E23
Continuity mistake: When West is pulling the string to shoot the gun, we can see under both knees his pants are covered in dirt. As he runs to enter the Saloon, the front camera shot shows no sign of dirt. (00:44:10)
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)
The Night of the Colonel's Ghost - S2-E24
Continuity mistake: The balcony railing is intact above the column post where West ties his horse. When West returns to his horse to leave, the railing post is detached and falling away from the balcony. (00:02:55 - 00:05:35)
The Night of the Colonel's Ghost - S2-E24
Continuity mistake: When West ties his horse to column, there is a boarded up entrance to the left with one wooden plank at a 45 degree angle in the middle. When West returns to his horse to leave, the plank is missing, and West rides off without having to untie his horse. (00:03:05 - 00:05:30)
The Night of the Deadly Blossom - S2-E25
Continuity mistake: When Barclay hangs the bone hatchet back in its place, the outline on the wall supposedly left by the item differs significantly from the artifact itself. (Most noticeable is the upper end: the outline has one long curled tip, but the actual hatchet has two short prongs there.) The outline was apparently drawn without the prop, or from a different prop altogether. (00:12:05)
The Night of the Deadly Blossom - S2-E25
Plot hole: There are two rockets to be launched. The right rocket launches. It is important for the plot for the remaining rocket to explode without being launched. Without explanation, the left rocket just falls off its ramp, lands on the floor and shortly explodes. (00:46:10)
The Night of the Deadly Blossom - S2-E25
Continuity mistake: In the final scene of this episode, the train is shown at twilight. When Gordon leaves the private box car, it is pitch black outside. The last shot of the episode shows the train in twilight again. (00:47:10 - 00:47:45)
The Night of the Cadre - S2-E26
Continuity mistake: The bird flies and lands on two books. To the right of the books is a red glass bottle with a frame document behind it. The next shot of bird shows it atop the red glass bottle which is now to the left of the books, away from the framed document. (00:01:10 - 00:02:45)
The Night of the Cadre - S2-E26
Continuity mistake: After a bomb explodes near West, when he stands up, there is a rip midway on the seam of the seat of his pants. In the subsequent fight scene, the tear is no longer visible. (00:28:25)
The Night of the Wolf - S2-E27
Revealing mistake: Though the stock footage is of a real wolf, the animal West wrestles with is too-obviously a dog wearing a fake pair of wolf ears. In later wrestling matches between West and the wolves, the attacking beast is a stuffed prop that never moves its legs, head or jaws at all. (00:03:30)
The Night of the Wolf - S2-E27
Visible crew/equipment: When the stagecoach pulls into the station, tracks from the camera truck can be seen in the dirt. (00:06:00)
The Night of the Wolf - S2-E27
Continuity mistake: West's coat collar alternates from turned up to turned down several times as the shots change. This continues to occur throughout the episode. (00:17:30)