New this month Phylicia Rashad (Clarie) was actually pregnant during season 3. That's why she was absent for most of the season and when she was shown, she had something like a table or desk covering her stomach.
Carl Anthony Payne II (Cockroach) was fired from 'The Cosby Show' by Bill Cosby because he refused to get a haircut.
Nearly every sweater Bill Cosby wore on this show was sent to him by a fan.
The episode entitled "Shakespeare" was originally scheduled to run in Season 3, but did not actually air until Season 4.