History Recap / TheSimpsonsS22E4TreehouseOfHorrorXXI

** Milhouse allows himself to sink into the ocean during "Battle Boat" because he was, in his words, tired of living.

* AllForNothing: In "Master and Cadaver", what sends Homer over the edge on his suspicions is when a shark seemingly dies after eating Roger's pie when he throws it overboard. Roger reveals the pie was just fine- the shark was just poisoned by the ''fuel leaking from the boat''. Zigzagged, in that it's possible Homer was just trying to get revenge for Roger repeatedly cock-blocking him, and used the pie as a convenient excuse. Still, it ultimately results in Roger, Homer, and Marge, plus the still-living remaining cruisers, all dying over a misunderstanding.

* AllForNothing: In "Master and Cadaver", what sends Homer over the edge on his suspicions is when a shark seemingly dies after eating Roger's pie when he throws it overboard. Roger reveals the pie was just fine- the shark was just poisoned by the ''fuel leaking from the boat''. Zigzagged, in that it's possible Homer was just trying to get revenge for Roger repeatedly cock-blocking him, and used the pie as a convenient excuse. Still, it ultimately results in Roger, Homer, and Marge, plus the still-living remaining cruisers, over a misunderstanding.

* TakeThat: "Tweenlight" makes fun of almost every thing ''Literature/{{Twilight}}'' has been building on.

* WholePlotReference: All of the segments subtly lampoon modern movies: ''Film/{{Jumanji}}'' for "War and Pieces", ''Film/DeadCalm'' for "Master and Cadaver" and (of course) ''Literature/{{Twilight}}'' for "Tweenlight."

-->'''Homer:''' Looks like you've got a ''flare'' from avoiding death.

--> '''Homer:''' They should've called this one, "Recipe for Disaster".\\

* RealityEnsues: Homer protecting Lisa from getting turned into a vampire in "Tweenlight" is negated due to the fact that ''he'' is turned into one instead and when deciding to fly away after turning into a bat he instead plummets to his death due to being too heavy.

* {{Foreshadowing}}: At the end of "Master and Cadaver," Maggie dons a bowler hat and fake eyelashes for one eye a la Alex [=DeLarge=] from ''Film/AClockworkOrange''. Turns out it became a subject for a [[Recap/TheSimpsonsS26E3TreehouseOfHorrorXXV future Treehouse of Horror]] segment called "A Clockwork Yellow", and Maggie as she appeared in that ending makes an appearance.

--> '''Homer''': They should've called this one, "Recipe for Disaster".
--> '''Marge''': What do you mean, "this one"?

** In "Master and Cadaver," Marge and Homer learned that they tried to murder an innocent man, only for Homer to murder Roger and all of the people on the ship who were miraculously not poisoned because he wants to leave no witnesses. Marge can't bear the guilt and eats the poisoned pie, leaving Homer alone in boat full of corpses.

* EveryoneHasStandards: Lisa was excited at the thought of being a vampire, until she learns that it would make her [[ChildVampire eight years old]] ''[[LampshadeHanging forever]]''. Dracula and Edmund still won't let her back out of it though!

* YankTheDogsChain: Bart manages to beat the board game "Satan's Path" and bring Milhouse back to life. Then he suggests they just play hangman, a game that has ''no'' board game pieces. The board game brings it to life, and Bart and Milhouse are hanged when they lose.