OverviewThe Cosby Show enters its third season as America"s most-watched television series -- and would continue to enjoy this lofty honor for four seasons to come. The basic cast of characters remains the same as in season two, headed by Bill Cosby as Brooklyn obstetrician Cliff Huxtable, Phylicia Rashad formerly Phylicia Ayers-Allen as Cliff"s attorney wife, Clair. Oldest daughter Sondra Sabrina Le Beauf, still attending Princeton University, is now seriously dating Elvin Thibedeaux Geoffrey Owens; second daughter Denise Lisa Bonet has graduated from high school and is attending Hillman College, alma mater of her father and grandfather; middle daughter Vanessa Tempestt Bledsoe and son Theo Malcolm-Jamal Warner are still in high school, with Theo hanging out more than ever with his pal Cockroach Carl Anthony Payne II; and youngest daughter Rudy Keshia Knight Pulliam has a new school friend named Kenny Deon Richmond. Sharp-eyed fans may notice that Clair Huxtable is spending an inordinate amount of time standing behind tables and desks, and wearing heavy coats. The reason, of course, is that actress Phylicia Rashad was pregnant -- and her character Clair was not. Additionally, quite a few seemingly fleeting characters show up in the episodes depicting Denise"s life at Hillman. Several of these characters would become regulars in the fall of 1987, when Lisa Bonet departed The Cosby Show to star in the spin-off series A Different World. Of the season"s many excellent episodes, special attention should be paid to "Bald and Beautiful, which reunites Bill Cosby with his former I Spy co-star Robert Culp and trivia buffs will get a kick out of Culp"s character name: Kelly Scott. Season three ends as Sondra Huxtable prepares to leave the family nest and become the wife of loyal Elvin Tibideaux.