S1·E30 From Hopeless To Helpless, Part 3

Tap Tap, disguised as Underdog, has been going all over the place committing crimes. After stealing the mayor's cigars, he goes back to the hideout of Riff Raff and begins to cut the Hopeless Diamond into pieces. Meanwhile, the real Underdog escapes the cave he is trapped in and flies back to town, where he gets shot at everywhere. Underdog is naturally confused, so he visits the mayor who is mad at him for stealing his cigars. Underdog visits the last person who is sure trusts him, Sweet Polly Purebred. Unfortunately, she too doesn't believe him and is upset at Underdog's actions, and he is taken away to jail, much to Underdog's shock.