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The Cosby Show

I Know That You Know

E21    Mar 19, 1987    22m    TV-PG
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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.
Where to Watch I Know That You Know
Cast of I Know That You Know
  • Bill CosbyHeathcliff Huxtable
  • Phylicia RashādClair Huxtable
  • Lisa BonetDenise Huxtable
  • Malcolm-Jamal WarnerTheo Huxtable
  • Tempestt BledsoeVanessa Huxtable
  • Keshia Knight PulliamRudy Huxtable
  • Sabrina Le BeaufSondra Huxtable
  • Geoffrey Owens

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