thomas. magnum. >> marion hammond. >> the private investigator. >> oh, you're probably wondering about the goat. um, just let me drop off. >> my friend, and then we'll talk. >> when we entered the 80s, a lot of one hour dramas that were light hearted, like magnum, p.i., were very popular. >> after mash went off the air. the next season, there wasn't a single sitcom in the top ten. first time that had ever happened in tv history. >> the prevailing feeling was that the sitcom was dead. >> brandon tartikoff, nbc programing chief, says reports of the sitcoms death were greatly exaggerated. >> time and time again, if you study television history, just when someone is counting a form out, that is exactly the form of programing that leads to the next big hit. >> so 1984, the cosby show comes on. now, bill cosby is not new to tv. he's had other tv shows, but the cosby show is very different. it stands apart from everything else he's done. >> mom, i wanted my eggs scrambled. >> coming right. >> up. >> we talked about. >> parenting previous to that on television. the kids were cool and the parents were i