CBN now The Family Channel aired the BCS in the 80's and I do believe one of our network affiliates here in Chicago aired this for years though it was often at odd times.
It's hard to know how often certain shows go into reruns though I've read somewhere I Spy reruns haven't been shown as much throughout the years and it's probably the same with Cosby's first sitcom.
Too bad since I was never really a fan of The Cosby Show.