Visible crew/equipment: After Opie tells Ellie everything that Andy told Aunt Bee, Ellie tells Opie that she's on the trail of a baboon, and when it cuts to the next shot of Ellie coming down the stairs we can see the chalk T-mark on the floor where she stands.
Continuity mistake: When Fred has a nightmare he drops his pillow on the floor, and just as Wilma gets out of bed to pick it up, Wilma's pillow simply vanishes into thin air within the same shot. (00:13:50)
Other mistake: September 12, 1973 - as Pat Phoenix walks through a door, the camera smacks into the back of her head with an audible thump. Once she enters the room, she glances angrily back at the crew, and a boom mic drops into shot to boot.
Same Picture, Different Frame - S4-E2
Continuity mistake: While Morgan is driving and gets a flat tire, in the close-up the Cadillac's license plate number is 84-I33, but in the wide shot it's 5G6-420. (00:09:20)