The Cosby Show: Season 06 (1989)

The sixth season of The Cosby Show marks the full-time return of actress Lisa Bonet in the role of Denise Huxtable, second of four daughters of obstetrician Cliff Huxtable (Bill Cosby) and his attorney wife, Clair (Phylicia Rashad). Bonet had been on maternity leave throughout much of season five, so it was explained that Denise had gone to Africa to work as a photographer's assistant. Now she's back, with a new husband in tow, Navy lieutenant Martin Kendall (played by new series regular Joseph C. Phillips). But wait, there's more: Denise is now also the stepmother of Martin's three-year-old daughter, Olivia (played by another new regular, Raven-Symone). Though the Kendalls move to Rhode Island, the Brooklyn-dwelling Huxtable parents remain in very close contact -- as they do with their other married daughter, Sondra (Sabrina Le Beauf), now living with her husband, Elvin (Geoffrey Owens) and their twin children, Nelson and Winnie (played in one episode -- and only in one episode -- by Clayton Griggs and Domonique Reynolds). As for the other Huxtable kids, Rudy (Keshia Knight Pulliam) and Vanessa (Tempestt Bledsoe) are still living at home, while college student Theo (Malcolm-Jamal Warner) has moved into a tiny apartment. The Cosby Show remained firmly in the number-one ratings slot throughout season six -- though it was tied with another sitcom from the Carsey-Werner factory, Roseanne. ~ Hal Erickson, Rovi