Visible crew/equipment: When Buck and Manolito finally meet up with John, Blue, and the other men, Buck hands over Olive to Sam, and in the next shot of Mano and Blue the boom mic dips into view at the top of the screen. (00:43:45)
Saga of Whizzer McGee - S4-E30
Continuity mistake: When Whizzer is pouring coins from a robbery into the hands of Melissa, she is wearing gloves in camera shots taken from one angle, but have bare hands in shots taken from another angle. This mistake is repeated 8 times.
The Night of Miguelito's Revenge - S4-E12
Revealing mistake: At the beginning of the episode, as Jim West walks away from the newsstand vendor and closes the magazine, a 1967 ad for DieHard batteries ("The DieHard Fights the Common Cold") can be seen on the right-hand page of the prop magazine, in a modern sans serif font.
Factual error: In the remastered DVD editions, on Doc Baker's wagon, you can see that the canvas wagon cover has a plastic window sewn into it.
Visible crew/equipment: Modern tyre tracks from the camera truck are seen in the mud as Alethea waves goodbye to Kwai Chang Caine.
Catawomper - S7-E19
Visible crew/equipment: When Marshal Dillon helps Kate down off the carriage, the moving boom mic casts a shadow on the wall on the left side of the screen. (00:23:05)
Factual error: Early in the episode, while Jason is at the log flume, power lines and transformers are visible to the left. (00:01:15)
Visible crew/equipment: A camera and microphone are visible on the front of Walt's vehicle after the opening credit/intro as he takes Ruby's call, explaining he's headed to Denver. (00:01:35)