"Uncle" Harry is a main antagonist in the 1983 Alvin and the Chipmunks TV series.
In his first appearance, Harry convinces The Chipmunks that he is their long lost maternal Uncle, which he's not anyway related to them, even though he's a chipmunk likes them and persuades them to work with him to raise money so that they can visit their mother, including do dangerous stunts against their own free will. In reality, Harry needs to use the money to pay a debt he owes to a carnival strongman, but they eventually got wise to Harry's scheme, they told Harry they send the money to Nome, Alaska, making Harry to go to Alaska to finds it, but they really have the money they've earned to get even with Harry and also get rid of him.
Harry uses similar schemes in future episodes to try and get The Chipmunks and The Chipettes to work for him so that he can steal their earnings; however, he never succeeds in actually stealing from either group in any of these episodes.
"Uncle" Harry is a burly and scruffy adult chipmunk with dark eyes usually dressed in an elegant and spoiled suit, a hat, and occasionally a pair of gloves and a scarf.
He always tries to trick The Chipmunks and The Chipettes by pretending to be someone else. For example, in the episode Santa Harry, he dresses as Santa Claus and asks The Chipmunks to help him set up Santa's Place.
Harry is mean, vile, and experienced at acting nicely to defraud people and steal their money. He is a con-artist that can't be trusted.