Gomez and Morticia are horrified to discover that Grandpa and Grandma Addams have a rare disease that is slowly turning them "normal". The only chance they have of curing them is to organise a family reunion, hoping that someone knows a home remedy. Unfortunately, due to a printing error, the family arrives at the reunion of an ordinary family named Adams (with one D). While Gomez and Morticia, oblivious to the mistake, search for a cure amongst a family divided by the wish to inherit; Pugsley and Wednesday are busy making new friends...explode; Uncle Fester and Thing search for a vicious Chihuahua that lives on human hair; and Lurch falls in love. Meanwhile, a couple going to the reunion are given the wrong address and end up at the Addams mansion where Granny and Cousin Itt are staying. No-one's life will ever be the same...

【雙面天才】（Genius）是迪士尼所製作的一部ＴＶ電影，於１９９９年於美國的迪士尼頻道首度播出。

An FBI agent investigating the kidnap then apparent murder of a wealthy businessman, has his suspicions. The authorities believe Ben to be dead, but the body could not be identified. Ben's wife is the prime suspect with her accomplice, the victim's brother. Brian has to go undercover(s) to get to the truth.