Revealing mistake: In the part in the motel where THING is doing morse code on the table to Gomez you can see the cut-out in the table where the guy's hand is sticking through the table.
The Addams Family (1991)
Ending / spoiler
Directed by: Barry Sonnenfeld
Starring: Christopher Lloyd, Christina Ricci, Anjelica Huston
Fester got amnesia because of a trip to the Bermuda Triangle. The fake doctor and Tully are killed and the family lives happily every after. Morticia is pregnant. Tully's wife Margaret, marries Cousin It and joins the Addams clan.
Grappa
More mistakes in The Addams Family
Gomez: Have no fear. The courts will decide. They say a man who represents himself has a fool for a client. Well, with God as my witness, I am that fool.
Trivia: The part of Morticia was originally offered to Cher, who passed because she felt that "The Addams Family" wouldn't do enough to boost her slumping (at least at the time) film career.
Question: It is revealed at the end of the film that Gordon is in fact the true Fester. However, all the photos and Gomez's home movie show young Fester as being completely bald. Then how did Gordon manage to have a full head of hair which he had to shave off in order to initially pose as Fester?
Answer: I guess we assume he always shaved his head.
Answer: Presumably when Fester was lost in the Bermuda Triangle, whatever supernatural forces caused him to lose his memory also made him grow hair. This gets reversed at the end of the movie when he's zapped by lightning, restoring his memories and destroying his hair follicles as well.