The Cosby Show

Season 3 Episode 21

I Know That You Know

Aired Thursday 8:00 PM Mar 19, 1987 on NBC



  • Trivia

    • The family decides to pull a practical joke on Cliff because he claims that they've never been able to fool him. Apparently he forgot about the time they all pretended to prepare an elaborate gourmet dinner, making sure he would overhear the activity, then served him a mushroom pizza on his birthday.

  • Quotes

    • Cliff: You are leaving this house now. You are leaving this house.
      Elvin: But...
      Cliff: No! No! You're leaving, you're leaving! You wanna now why? Because I GOTCHA!

  • Notes

    • For his work in this episode, Jay Sandrich was nominated for an Emmy for Outstanding Directing in a Comedy.

  • Allusions