The Great Treasure Hunt - S2-E19
Revealing mistake: When Fester gives the anchor to Morticia, she drops it, and it bounces back up. When she lays it down, the wire used to achieve the gag is easily seen.
The Addams Family (1964)
1 revealing mistake in The Great Treasure Hunt - chronological order
Starring: John Astin, Carolyn Jones, Jackie Coogan, Ted Cassidy
Morticia and the Psychiatrist - S1-E2
Continuity mistake: When Morticia is watching Gomez and the trains, at the second of the collision and explosion, it's a re-use of the shot when Mr. Hilliard is there, as in just a split second, you can see him, then there's Morticia again.
Morticia: Think of Romeo and Juliet.
Gomez: They died.
Morticia: Oh, but what fun they had those last three days.
Trivia: John Astin (Gomez), Carolyn Jones (Morticia) and Ted Cassidy (Lurch) are the only actors to appear in all 64 episodes of the show.
Question: How was effect of the light bulb that lit up whenever Fester put it in his mouth achieved?
Answer: Basically from what I understand, they stuck the innards of a small flashlight into the base of the bulb and put a little switch on it. When he put it in his mouth and bit down, his teeth would hit the switch, which would turn on the flashlight and made the bulb light up.
TedStixon