Continuity mistake: After Herman breaks through the doors in the opening sequence, the underlying wood over the right side of the hole is plain plywood. When it's Lily's turn to come out, the wood has been stained to match the rest of the door, and Herman's outline is more distinct.
Herman's Child Psychology - S2-E1
Continuity mistake: At the end, as the family sits at the table, Herman's napkin alternates between being flat and half folded.
Herman, the Master Spy - S2-E2
Continuity mistake: The trawler is visible after Herman goes out, then gone when Lilly scans for Herman.
Continuity mistake: As Chester walks in the front door, the newspaper he holds jumps from his right hand to under his right arm.
Herman Picks a Winner - S2-E16
Continuity mistake: The pill Grandpa the bat brings Herman goes from round to oval between shots.
Continuity mistake: After Herman wakes Lily and she scolds him, he closes his magazine with the front cover toward the camera. A second later, the magazine's back cover is facing out.
Continuity mistake: In the kitchen, the popover trays alternate between half empty and full between angles.
Herman, the Tire Kicker - S2-E28
Continuity mistake: The semi trailer the crooks used to get the cars away is way too short for all the cars put into it. As each car goes in, it disappears.
Continuity mistake: When the foreman looks at Herman, he does a double take, and he flips his pencil over to put it down. When the angle changes, he repeats the actions.
Answer: The comedic gimmick of both "The Munsters" and "The Addams Family" television shows in the 1960s was that both families were convinced they were normal and everyone else they encountered was odd. The Addams Family, for example, thought their "normal" visitors were mentally unbalanced because they always fled the Addams' weird home in panic. That was a running gag throughout the entire Addams Family series, so much so that easily half of nearly every episode was devoted to the predictably terrified reactions of their visitors (always accompanied by identical canned laughter). Meanwhile, in the Munsters' universe, the family thought "normal" people were physically deformed and even quite hideous. For example, the Munsters believed that their beautiful niece, Marilyn, was socially handicapped by her ugliness (the exact opposite of the truth); and, in the episode "Just Another Pretty Face" (S2E17), when Herman Munster was temporarily transformed into a "normal" person, his entire family found him utterly repulsive. The family's hidden revulsion to "normal" people was the running gag of The Munsters.
Charles Austin Miller