The Cosby Show: 3x21
I Know That You Know
When Sondra and Elvin announce their engagement, Clair and the children use the news to play a practical joke on Cliff, who launches a counter-offensive of his own. Geoffrey Owens as Elvin.
3 - 1Bring 'em Back Alive Sep. 25, 1986
3 - 2Food for Thought Oct. 02, 1986
3 - 3Golden Anniversary Oct. 09, 1986
3 - 4Man Talk Oct. 16, 1986
3 - 5Mother, May I? Oct. 23, 1986
3 - 6The March Oct. 30, 1986
3 - 7Theo's Flight Nov. 06, 1986
3 - 8Vanessa's Rich Nov. 13, 1986
3 - 9Denise Gets a D Nov. 20, 1986
3 - 10A Girl and Her Dog Dec. 04, 1986
3 - 11War Stories Dec. 11, 1986
3 - 12Cliff in Charge Dec. 18, 1986
3 - 13Monster Man Huxtable Jan. 08, 1987
3 - 14Rudy Spends the Night Jan. 15, 1987
3 - 15Say Hello to a Good Buy Jan. 22, 1987
3 - 16Denise Gets an Opinion Feb. 05, 1987
3 - 17Calling Doctor Huxtable Feb. 12, 1987
3 - 18You Only Hurt the One You Love Feb. 19, 1987
3 - 19The Shower Feb. 26, 1987
3 - 20Cliff's 50th Birthday Mar. 12, 1987
3 - 21I Know That You Know Mar. 19, 1987
3 - 22Andalusian Flu Apr. 02, 1987
3 - 23Bald and Beautiful Apr. 09, 1987
3 - 24Planning Parenthood Apr. 30, 1987
3 - 25Hillman May. 07, 1987