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.
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)
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)
Revealing mistake: Both stunt double's faces are plainly visible in the fight between Jeremy and Rafe. (00:26:10)