I Know That You Know (S03E21)
S03E21
Sondra and Elvin share their exciting engagement news, prompting Clair and the kids to pull a playful prank on Cliff. Unfazed, Cliff retaliates with his own clever scheme. Geoffrey Owens stars as Elvin.
Show
The Cosby Show
Episode
S03E21
Air Date
Mar 19, 1987
Season 3 Episodes
S03E01
Bring 'em Back Alive
S03E02
Food for Thought
S03E03
Golden Anniversary
S03E04
Man Talk
S03E05
Mother, May I?
S03E06
The March
S03E07
Theo's Flight
S03E08
Vanessa's Rich
S03E09
Denise Gets a D
S03E10
A Girl and Her Dog
S03E11
War Stories
S03E12
Cliff in Charge
S03E13
Monster Man Huxtable
S03E14
Rudy Spends the Night
S03E15
Say Hello to a Good Buy
S03E16
Denise Gets an Opinion
S03E17
Calling Doctor Huxtable
S03E18
You Only Hurt the One You Love
S03E19
The Shower
S03E20
Cliff's 50th Birthday
S03E21
I Know That You Know
S03E22
Andalusian Flu
S03E23
Bald and Beautiful
S03E24
Planning Parenthood
S03E25
Hillman