Other mistake: The opening credits for season 5 show June coming out of the front door with a pitcher of what looks like iced tea, and calling for Ward, Wally and Beaver who are all working outside. But the door opens by itself as she comes out, and then closes by itself behind her. If the entire family is outside, who opened and closed the door?
Visible crew/equipment: In the wall mirror behind Clint Eastwood, the shadow of the boom rigging can be seen moving up and down. (00:08:00)