Actor Allusion: In "Operation: Wingman". Noah, who is played by Fred Savage, goes to prom with Claire, a girl voiced by Danica McKellar, who is well-known for playing Savage's love interest Winnie Cooper in The Wonder Years.
Bonus Episode: The last episode of the series aired was "Rock My World", which doesn't really have anything to do with the overall plot. However, it seems that the producers realized it would be the very last episode instead of "End Game" and threw in an Animation Bump, Awesome Music original to that episode, some light Fanservice by bringing back Holiday's little sister, and crafted the plot to be just 22 minutes of Rex being awesome to let the series end on a high note.
Keep Circulating the Tapes: only the first 9 episodes have ever been released to DVD; thankfully, the entire series is on iTunes and Netflix.note This includes the Bonus Episode "Rock My World", in case you were wondering.
Screwed by the Network: The back half of the final season went straight to iTunes, despite network promises that it would actually be aired. It did actually air... ten months later, where it was quickly shown over a few days in the morning, and is still missing two episodes.