Continuity mistake: During the play, when Pugsley slices Wednesdays throat, there is blood on the front of her shirt. When she turns to face the audience, the front of her shirt is clean.
Continuity mistake: The Red Indian statue Lurch incinerates at the motel later reappears undamaged.
Continuity mistake: When Mrs. Craven introduces Tully to her "son" Gordon, Gordon grabs Tully by the shirt collar with his right hand but in the next shot is using his left hand.
Continuity mistake: During the Mamoshka dance, they cut away to Tully and Greta talking, behind them walking around we see guests who are in the ballroom at the same time.
Continuity mistake: When Fester comes down to the party and the shot cuts to everyone stopping dancing when Morticia calls for their attention, close to the center of the room is a woman with very frizzy orange hair dancing with a man with lots of facial hair. When the shot cuts back to Fester and Morticia, this couple is right behind Fester near the door to the hall.