How long did The Cosby Show air?
The Cosby Show
Most of the story in the pilot presentation is taken from Bill Cosby's classic comedy film Bill Cosby: Himself. Cosby's character is called "Clifford" in the early episodes of the first season (as evidenced by his name plate on the exterior of the Huxtable home). His name was later switched to "Heathcliff".  Although, in one episode, Clair calls him "Heathclifford".