Continuity mistake: At the very end of the episode Clair's glass is suddenly fuller after Denise gets done singing.
The Cosby Show (1984)
1 continuity mistake in Cliff's Birthday
Continuity mistake: In this episode, Rudy is riding her bike around the house which is right on the corner of a block. Since when is their house on the corner?
Theo: You two are the most obnoxious people that I ever met.
Rudy: Thank you, your grumpiness.
Trivia: This is the first appearance of Sondra, the eldest of the five Huxtable children. Sabrina LeBeauf, who plays Sondra, beat out future pop star Whitney Houston for the role.
Autumn Gifts - S4-E7
Question: When Cliff is watching TV, the sound of voices singing "Open the door and let me in." come from the television. What song is this?
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Chosen answer: That is the song "Open the Door Richard."