This is probably the best pilot I've seen. Even though not all the details of the show weren't polished yet, the pilot was inviting enough to keep viewers motivated to keep watching.
The scene were Theo talks to Cliff about him being a "regular person" is one of the best I've seen on a TV show. And after you hear what Cliff had to say to his son, you know what this show was going to be all about: a fun yet deep lesson on parenting.
I've seen episodes from the eight seasons of The Cosby Show, and this one is still very close to the top of the list of the best ones.