Visible crew/equipment: In the first scene of the episode, a crew member is visible through an open door beside the staircase.
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.
Come Back, Little Googie - S1-E25
Other mistake: When Eddie's naughty little friend goes to shake hands with Herman they insert a quick close up of a hand buzzer in his hand, only it's obviously an adult's wrinkly hand.
Revealing mistake: After the car hits Herman, it falls apart. After the left front tire falls off, the prop holding up the frame is plainly visible.
Continuity mistake: In the kitchen, the popover trays alternate between half empty and full between angles.
Revealing mistake: At the party, when Lily is told by her dancing partner that she's dancing on air, the dark stunt wires keeping her aloft are visible. (00:16:25)
Other mistake: Herman's Dr.'s appointment is at 9am but the wall clock in the Dr.'s office shows the time at 9:33 or so.
Suggested correction: Most doctors keep patients waiting much longer than this. The clock should have read 9:45 at least.
Revealing mistake: When the helmet is taken off Herman, it briefly pulls up the wig.
Other mistake: When YoYo drops Herman after the potion wears off, his wig flops up.
Audio problem: As everybody goes to get in the new car, you hear the horn honk twice. Trouble is, Grandpa wasn't holding the horn bulb.
Revealing mistake: Herman's wig flips up and down when hit by the car and lying in the puddle.
Pike's Pique - S1-E5
Revealing mistake: As Herman goes to lift the couch, if you look at the fireplace mantel, you see the shadow of the mechanical hoist used to complete the gag.
Will Success Spoil Herman Munster? - S2-E12
Visible crew/equipment: After Herman pulls the cord to close the coffin phone, as it closes, the shadow of the boom mic is on the wall at the top of the shot.
Visible crew/equipment: As Herman goes to stand up from trying to wake Ramon, the top of the set wall is visible, as well as the cut away section of the ceiling.
Pike's Pique - S1-E5
Revealing mistake: After Grandpa says good night, there is a huge cloud of smoke, signifying his change to a bat. As the smoke clears, in the lower right corner of the screen, Grandpa can be seen ducking out of the shot.
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.
Revealing mistake: When Lily pulls in the sheets that Herman used to run away, the background doesn't show the house across the street or any of the town. Rather, it's blank, with shadows of the tree branches outside the balcony.
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.
Herman, the Tire Kicker - S2-E28
Visible crew/equipment: As Herman and the salesman walk to the convertible, the shadow of the boom mic can be seen coming toward the camera on the right side of the frame.
Herman, the Tire Kicker - S2-E28
Revealing mistake: As Herman lifts the VW Beetle, the shadow of the lift arm can be seen on the ground under the left side of the car.
