It's amazing that The Simpsons defeated a heavyweight like Cosby showing nothing but Season One reruns at first. The characters had no choice but to plead for viewers to wait:
The next week was Bart's turn:
The second new Simpsons episodes debuted, Fox wanted you to KNOW. They took out THREE pages on October 11, despite one of them being completely wasted:
Ha ha, Bart's got an Acme Detonator, and he's gonna blow up the Road Runner....er, I mean Homer....
...y'know, I doubt Groening approved this concept here, despite what the little signature implies. He wanted to keep them down to earth and free of traditional cartoon wackiness, at least at first.
Simpson and Delilah -- October 18, 1990