Grampa realizes Bart thinks he is an old coot. But when Mr. Burns is out to get him, he tells Bart the story of the Flying Hellfish, and how he has to outlive Burns and he gets the bonanza. So now it is a race to get to the bonanza between Grampa and Burns. In the end, everything is back to normal when the owner of the bonanza, paintings, comes, and Bart tells Grampa he really loves him.
I really like this episode, especially the epic tone of the last act. My overall grade for this episode is an a+