A charlatan chipmunk named Harry tells Alvin, Simon, and Theodore that he is their long lost uncle. The Chipmunks do concerts and stuns in order to get the money that Uncle Harry says will help them visit their mother, though they must leave Dave in order to perform. After the boys overhear Harry talking to Luke claiming he was a fake, they devise a plan to get their money. The plan goes sideways, but they improvise by scaring Harry. As The Chipmunks head back home, glad to see Dave again, Harry travels to Alaska, thinking that's where the money is.
- First appearance of "Uncle" Harry.