Season 22, Episode 4
The annual Halloween Simpsons special:
In the first episode, War And Pieces, Bart and Milhouse unleash the fury of every board game in the world when they begin to play a game called Satan's Path. All the pieces of all the other games come to life and threaten to destroy mankind unless the boys can complete the game, in the form of Mouse Trap.
The second story, Master And Cadaver has Marge and Homer rescue a drifting boatsman at sea. Although Homer is suspicious of him and his intentions, Marge gives the man the benefit of the doubt when he tells the story of how he was accused of poisoning his former shipmates.
In the third story, Tween Light, Lisa befriends a vampire at school. She invites him to dinner, where they are both embarrassed by their respective fathers.
The opening credits run for an annoying 6 minutes for gods sake.
*Read a more detailed summary for this episode on Wiki Simpsons