Mythology Gag: Dad comes across a Krazy Kat painting as in the original strip - only this time he reacts with disgust.
Just One Second Out of Sync: The episode's main plot concerns Calvin, Hobbes, and Socrates all being out of sync.
Shout-Out: Subverted - the episode was originally named "Terror From the Year 2011", then "2012", then the current title, because of two reasons - the original name would become outdated no matter what year was chosen, and the episode doesn't have much "terror" in it anyway.
