The Addams Family (1991)

The Addams Family steps out of Charles Addams' cartoons. They live with all of the trappings of the macabre (including a detached hand for a servant) and are quite wealthy. Added to this mix is a crooked accountant and his loan shark and a plot to slip the shark's son into the family as their long-lost Uncle Fester. Can the false Fester find his way into the vault before he is discovered?