A group of news station representatives plan to cause mass panic by fabricating a faux disease caused by household cats and state, among other things, that there is a vaccine available in limited supply. At the Springfield hospital, Mr. Burns steals a significant portion of the vaccine for himself, running over the rest of the vaccine with his car in the process. After learning from his doctor that he is suffering from multiple illnesses and has only six weeks to live, Burns becomes distraught by the town’s less-than-sensitive reaction to his announcement. Burns attempts suicide by leaping from a cliff, yet ends up surviving, albeit with some amnesia and delusional behavior. Bart finds Mr. Burns weak and vulnerable in the wilderness and secretly takes him into the Simpsons' home. When Homer and Marge learn about their new houseguest, they, along with the rest of Springfield, decide to get some payback for all the misery he has caused them over the years.[1] When Lisa takes Burns back to his mansion, his memories return changing him back to his cruel, heartless self, and decides to put a dome over the town to get revenge on everyone who had treated him badly (similar to The Simpsons Movie), only to be informed that "it's been done." In the end, Mr. Burns flies away in his helicopter piloted by Smithers, who at first believed Mr. Burns had died and spent a brief time working for former Vice President Dick Cheney. The two are immediately greeted by Nelson Muntz, who threatens to crash the helicopter unless Mr. Burns agrees to attend a school play posing as Nelson's father.