Clair's Sister

Clair's Sister is the ninth episode of Season 2 of The Cosby Show, also the 33rd overall in the series. The episode was directed by Jay Sandrich and written by Elliot Shoenman and .[[John Markus] The episode originally aired in the United States on NBC on November 21, 1985.

Synopsis
Clair's young sister arrives with news of her finally becoming engaged. Clair lets her know that married life won't be as simple as she thinks.

Plot summary
The Huxtable family is thrilled when Clair's sister, Sara, announces her engagement. Legendary jazz vocalist, Joe Williams, plays Clair's father, Al Hanks, who refuses to sing at his younger daughter's wedding unless Clair sings with him. Clair and her mom, Carrie Hanks, join forces to teach Sara a little something about marriage while Grandpa Al and Cliff chide the groom-to-be about the role of a husband. Notes

This is the first appearance of Joe Williams as Clair's father Al Hanks. Guest appearance: Mario Van Peebles appears as Garvin. Sabrina Le Beauf does not appear in this episode.

Phylicia Rashad and Joe Williams sing a version of "We Belong Together" by Shelton Becton in this episode.