The Cosby Show S3E21: I Know That You Know
- Aired: 1987-03-19
- Time: 20:00:00
- Runtime: 30 minutes
Overview
Sondra and Elvin announce their engagement. Since Cliff always says he knows everything that goes on, Clair and the kids decide to play a joke on Cliff about the engagement. He finds out before the joke and turns the tables on the others.