The Cosby Show
The Cosby Show

The Cosby Show (1984 – 1992)

1984 • 8 seasons • Comedy, Family • TV-G
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70% 460
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On August 9, 2026
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Episode 21 — I Know That You Know

Season 3 • The Cosby Show
Released: 1987-03-19 • Comedy/Family
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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 Stream Episode 21

Season 3 · Episode 21 · Streaming in USA
by JustWatch
Philo
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Episodes

Information

Episode air date19.03.1987
Episode runtime22 min
Episode rating0.00
GenresComedy / Family
TMDB series rating7.0
IMDb series rating7.4
Series statusEnded
Age rating0+
CountryUS

Trailer

Additional videos

The Cosby Show (1984-1992) Seasons 6-7 Intro
The Cosby Show (1984-1992) Seasons 6-7 Intro
▶
The Cosby Show (1984-1992) Season 5 Intro
The Cosby Show (1984-1992) Season 5 Intro
▶
The Cosby Show (1984-1992) Season 4 Intro
The Cosby Show (1984-1992) Season 4 Intro
▶
The Cosby Show (1984-1992) Season 3 Intro
The Cosby Show (1984-1992) Season 3 Intro
▶
The Cosby Show (1984-1992) Season 2 Intro
The Cosby Show (1984-1992) Season 2 Intro
▶
The Cosby Show (1984-1992) Season 1 Intro
The Cosby Show (1984-1992) Season 1 Intro
▶

Cast

Bill Cosby
Bill Cosby
Heathcliff Huxtable
Phylicia Rashād
Phylicia Rashād
Clair Huxtable
Malcolm-Jamal Warner
Malcolm-Jamal Warner
Theo Huxtable
Tempestt Bledsoe
Tempestt Bledsoe
Vanessa Huxtable
Keshia Knight Pulliam
Keshia Knight Pulliam
Rudy Huxtable
Sabrina Le Beauf
Sabrina Le Beauf
Sondra Huxtable
Geoffrey Owens
Geoffrey Owens
Elvin Tibideaux
Raven-Symoné
Raven-Symoné
Olivia Kendall
Erika Alexander
Erika Alexander
Pam Tucker

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