Out of Order: The first aired episode, "The Looney Beginning", was actually 48th in production order. It was presumably front-loaded because of its origin storyline. Unfortunately for Kennedy, this meant the retakes had to be sped up, and Wang had to step in to produce additional animation on really short notice. The episode was still being finished on the day it was set to air. Luckily, it made the deadline.
Playing Against Type: Fantastic Four, being a superhero show and not a cartoon-y cartoon like most of their other work.