Treehouse of Horror XXI
| Episode Number | 4 |
|---|---|
| Season | 22 |
| Aired | 2010-11-07 |
| Overview | In the 21st Treehouse of Horror episode: Bart and Milhouse discover a real-life board game that they must win to return home in "War and Pieces"; Lisa falls in love with a moody, preteen vampire in the Twilight parody "Tweenlight"; and Marge and Homer go on a honeymoon on a sailboat, and rescue a castaway named Roger who tries to kill them in the Dead Calm parody "Master and Cadaver". |
| Runtime | 25 minutes |
| Absolute Number | 468 |
| Finale Type |