Wednesday, Pugsley and Thing find out Lurch has been dumped by his girlfriend. Fester builds him a robot girlfriend. However Lurch isn't interested and Wednesday calls up his ex to try and reunite them. Meanwhile cousin Itt falls in love with the robot. Wednesday builds several versions of her brother with her mother's paint set. The Spy Twins try to break into the Addams' safe which is guarded by Thing.
N.J. is fed up with his parents' weekly speeches about underwear. He doesn't want to take over his father's business and runs away from home. N.J. crashes in the Addams' residence. With Wednesday and Pugsley' help he is introduced as Mumbles Addams, a long lost cousin.
Thing who is bored and wants to become a star. Wednesday tries to help and Granny predicts fame and fortune. She goes with Thing to Hollywood where his talents bring a lot of fame. The Spy Twins try to capture Cousin Itt which always tend to go wrong with the other Addams Family members. Uncle Fester shares his experiences in his diary.
Wednesday beats Pugsley in the joust every year. Gomez and Uncle Fester give him some pointers so Pugsley could win. Uncle Fester reads his comic book called "Festerman" to Wednesday. Morticia has lost her artistic touch. So Lurch and Thing try to help.
Gomez and Morticia are delighted by Grandma's Halloween tale about events that happened 40 years ago. Grandmama talks about a man who went golfing on Halloween night, and was struck by lightning and lost his head. He then re-appeared as the Puttergeist.
Gomez and Uncle Fester find the Hiding Horn in the attic and play Hide and Seek with Lurch. The Spy Twins kidnap Wednesday and Pugsley and use them as bait for Cousin Itt at their swamp hideout. Gomez is relaxing, when Thing challenges him to a sword fight.
Morticia is sadden by Wednesday and Pugsley's neglect, who spend time with others instead with their mother. Morticia decides to become more active with their school activities when the teacher in charge gets sick. She organizes a scavenger hunt at the Addams residence. But Normina Normanmeyer tries to prevent the children from going to the Addams house.
Morticia recommends glasses for Grandmama's blurry vision. But Grandmama won't wear glasses and accidentally uses Uncle Fester's Growth Spray that makes Thing to grow to 20 ft. Wednesday reads her version of Little Bad Riding Hood to Pugsley before going to bed. Pugsley and Thing plan to use a formula to turn Wednesday into a dog.