The most troublesome show was the one that became our last episode last season, the babysitter episode. It was supposed to be our premiere. It still has traces of the technical problems in it. There was a director on the original team who had a really different philosophy of animation. It was fine for other shows, but he insisted on trying it on The Simpsons .
Animation is cheap if done very simply.
Because the last step we see is white on black drawings with key poses of the characters. There are many problems you can't catch at that state, and the first time you see them, they're completely drawn out, hundreds of frames, and there's nothing you can do about them. Klasky Csupo, the people who do our animation, do a wonderful job. We're lucky to have them. The one difference is that you don't have run-throughs with the cast, making it easier for time.