The Cosby Show Season 3 Episode 21
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 - 25HillmanMay. 07, 1987
- 3 - 24Planning ParenthoodApr. 30, 1987
- 3 - 23Bald and BeautifulApr. 09, 1987
- 3 - 22Andalusian FluApr. 02, 1987
- 3 - 21I Know That You KnowMar. 19, 1987
- 3 - 20Cliff's 50th BirthdayMar. 12, 1987
- 3 - 19The ShowerFeb. 26, 1987
- 3 - 18You Only Hurt the One You LoveFeb. 19, 1987
- 3 - 17Calling Doctor HuxtableFeb. 12, 1987
- 3 - 16Denise Gets an OpinionFeb. 05, 1987
- 3 - 15Say Hello to a Good BuyJan. 22, 1987
- 3 - 14Rudy Spends the NightJan. 15, 1987
- 3 - 13Monster Man HuxtableJan. 08, 1987
- 3 - 12Cliff in ChargeDec. 18, 1986
- 3 - 11War StoriesDec. 11, 1986
- 3 - 10A Girl and Her DogDec. 04, 1986
- 3 - 9Denise Gets a DNov. 20, 1986
- 3 - 8Vanessa's RichNov. 13, 1986
- 3 - 7Theo's FlightNov. 06, 1986
- 3 - 6The MarchOct. 30, 1986
- 3 - 5Mother, May I?Oct. 23, 1986
- 3 - 4Man TalkOct. 16, 1986
- 3 - 3Golden AnniversaryOct. 09, 1986
- 3 - 2Food for ThoughtOct. 02, 1986
- 3 - 1Bring 'em Back AliveSep. 25, 1986