Overhearing everything, the Professor and Sylvester decide to use George's plan as an opportunity to get more money from him. Dennis helps the police (unintentionally) catch them (as they pretending to be several different workmen at the Wilson house when they were planning to move, attempting yet again to drain his bank account by stockpiling a hoard of his as yet un-endorsed checks by claiming that the house needed several repairs before it could be sold). Dennis, who was a "menace" throughout the whole film, ends up being a hero.