Bart Simpson's Treehouse of Horror #22: Ghøst Bashers; The Ex Files; Retirement Castle of the Vampires; Bart & Lisa vs. The Red Menace

First of all, Bongo invites everyone to visit the Retirement Castle of the Vampires! Really... even your older, bloodsucking relatives need some attention. (Visiting hours are from 9 to 6.) Then, former couple Lisa and Nelson team-up to investigate paranormal activity at Springfield Elementary, prompting them to open The Ex-Files! And something's really strange in the neighborhood when the Ghost Bashers come to town!