Other mistake: The outside shots show that the house is in the middle of a row of houses, connected to other houses on both sides. But in the living room, behind the stairs, is a window looking outside. There couldn't possibly be a window there as that is where the house shares a wall with the house next door.
The Cosby Show (1984)
1 other mistake in show generally - chronological order
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: Nearly every sweater Bill Cosby wore on this show was sent to him by a fan.
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?
Chosen answer: That is the song "Open the Door Richard."