Treehouse of Horror XX/References

General

References/Trivia

Appearances

Gags

Credits

Quotes

Cultural references

• The first segment is a pastiche of numerous Alfred Hitchcock films. The main plot derives from Strangers on a Train, where two men plot to kill off each others' enemies. When Lisa chases Bart, the title music from North by Northwest plays, while other elements of North by Northwest, Vertigo and other Hitchcock movies are included. Hitchcock himself is shown in a brief cameo stepping out of a bus (as he did in the title sequence of North By Northwest).
• The second segment is a parody of both 28 Days Later and Children of Men, in that a plague of pseudo zombies are ravaging the world, and that a child holds the key to mankind's salvation and must be protected at all costs.
• The third segment is a parody of Sweeney Todd.
• Hubert Wong is a reference to Amy Wong from Futurama.

Goofs

• In the second segment, when Bart and Homer initially step outside and Homer blows their cover, Kirk Van Houten is seen in the back right of the muncher mob breaking down the front door to try to get to the Simpsons.  Yet, when they make it to the safe zone, Mr. Van Houten is clearly seen in the front of the crowd before the Simpsons push themselves through.  While it may be a goof, it could also be someone similar to him, though the physical features are astonishingly alike.
• Ralph Wiggum is seem as a muncher eating his own arms. Yet he is seem happy and healthy at the end of the segment. Of course this could mean that Bart's immunity also doubles as a cure for the already infected. You can see Homer is still in his "muncher cage" behaving like a muncher.
• In the first segment, Mrs. Krabappel goes into her apartment without unlocking her door.
• After Homer becomes a muncher, the gun turns into a single barrel.

Trivia

• This is the first episode since Treehouse of Horror X to air in October.
• The segment, Don't Have a Cow Mankind, is the third time Springfield has been over run by zombies (the first two being Treehouse of Horror III and Treehouse of Horror XIII).
• At the end of the second segment, Homer still hasn't been changed back to normal (Bart probably wanted Homer to stay that way.)
• The ending song is the first time the main theme has been used for a song sung by the Simpsons
• Ratings: 8.59 million viewers.
• The coustumes the monsters from the opening segment wore were Frankenstein as SpongeBob, the Werewolf as Harry Potter, Mummy as Jack Sparrow, and the Vampire as Iron Man.