Deliberate mistake: Robert Brown wears a gold turtleneck sweater with his leather outfit throughout the series. Though it's more than 100 years beyond the show's 19th Century setting, he and the producers decided that he looked good in it, so allowed the anachronism to stand.
Revealing mistake: The mock-up of Clancey's ship that we see from the town never matches the stock footage of the ship at sea. Nor, apparently, did budget restraints allow for any movement of the mock-up that would make it appear to actually be floating on water. It glides into port on what is obviously wheels, perfectly level, and without a single creak or groan that a real ship would make.
Visible crew/equipment: When Jason, his brothers and all his men are marching down the wet street, tire treadmarks from the camera truck are visible in the mud under their feet.
Continuity mistake: Just before they leave for the meeting at Lottie's Place, Jason places a hand on Jeremy's shoulder. When the shot cuts, his hand jumps to a much lower position on Jeremy's forearm. (00:41:05)
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)
Continuity mistake: While he's talking to Stemple in Lottie's saloon, Clancey's red neckerchief keeps changing positions between shots. (00:14:20)
Continuity mistake: During the fight between Stemple and Jason, they overturn a large crate marked "Farm Machinery" in front of the general store. Two shots later, the same crate has somehow righted itself, and they overturn it again. (00:25:30)
Revealing mistake: When Stemple and Jason argue on the porch, an electric light bulb is very apparent in the lantern beside the door. (00:41:00)
Continuity mistake: Clancey's bath bubbles are touching his chin in close-ups, but retreat more than a foot in every full shot of him in the tub. (00:32:00)
A Bride for Obie Brown - S2-E14
Revealing mistake: During the log-rolling contest at the end, Bobby Sherman's stunt double is very easy to spot. He has lighter, shorter hair and is much taller. His face (in profile) is even visible in several shots. (00:46:00)
Continuity mistake: In the opening scene, Jeremy falls and is clinging to a cliff face. In the close-ups, he's holding onto fairly solid grey rocks. In all the long shots, however, his stunt man/double is precariously perched on crumbling brown dirt. (00:01:00)
Revealing mistake: Both stunt double's faces are plainly visible in the fight between Jeremy and Rafe. (00:26:10)