Season 3, Episode 21 I Know That You Know

First Aired: March 19, 1987

When Cliff brags he's too clever to be outsmarted, the family devises a joke to play on him. Phylicia Rashad. Sondra: Sabrina LeBeauf. Elvin: Geoffrey Owens. Rudy: Keshia Knight Pulliam.

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  • Premiered: September 20, 1984
  • Rating: TV-G
  • Premise: Cosby played a doctor and dad in this all-time classic, which was TV's biggest hit in the 1980s and almost single-handedly revived the sitcom genre and NBC's ratings fortunes after ABC passed on the series. Mostly set in a Brooklyn brownstone, the series f… (more)

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