But überprops go to rock_god for the rightest answer, and foiling the caveat that made me almost right: Lamont's Funeral was the second Cosby Show episode, counting the pilot, which is as immemorable as its description on NickatNite.com:
Theo's poor report card and Denise's scary date create serious tension among the Huxtables. FACTOID: The sign outside the Huxtable home reads "Clifford Huxtable, M.D." In later episodes, Cliff's real first name is revealed to be "Heathcliff."
2. Goodbye, Mr. Fish
Cliff arranges an elaborate funeral for Rudy's beloved pet goldfish, Lamont.
Aah, the Rock God. Apart from trivia that may have won him a car, is there anything he doesn't know?