This episode starts Mr. Turner's paranoia that Mr. Crocker is trying to steal his wife.
Apparently Timmy is never supposed to have an A+ on anything (especially tests) because it is apparently a sign of the "a"pocalypse.
The Wheel of Torture has Jorgen's name almost everywhere on it meaning that Jorgen is almost always most likely to choose where the next convention is.
Binky thought the Black Plague was a band which was why the Secret Fairy Convention was at the Black Plague one thousand years ago.
This is the first time Mr. Crocker guesses about how a seemingly impossible event happen involving Timmy's fairies. Ironically he's wrong as it's against Da Rules and it was pure luck Timmy got his A+ (he doodled on it due to his short attention span).
The episode pairing Cosmo Con and Wanda's Day Off! is the only episode pairing that have Cosmo and Wanda in the names which is possibly a coincidence.
Comic Con - The episode's title is a reference to the convention.
Binky claims that he got the Black Plague to come to last year's Secret Fairy Convention which caused half of Europe to be wiped out and a short while later we flash-forward 1,000 years. In reality, the Black Plague ravaged Europe between 1347 and 1351 and only wiped out one-third of Europe.
When Crocker barges in, cannot see, and goes sliding, the pot is on his head. Moments later, it is in his hands.
After Cosmo destroyed Fairy World when he was a baby, Fairy World was all modernish, or maybe Fairy World rebuilt civilization in the style of medieval after that.