Deliberate mistake: The circular desk where Carol sits should be rotated 180 degrees so she is facing the elevators. How many times have you gotten off an elevator in a fancy office building only to see the back of the receptionist's head?
The Bob Newhart Show (1972)
1 deliberate mistake in show generally - chronological order
Starring: Bob Newhart, Suzanne Pleshette, Bill Daily, Peter Bonerz, Marcia Wallace
Genres: Comedy
Other mistake: In the opening credits, Bob answers the phone. None of the buttons light up when the phone rings. On that style of phone, the light would indicate which line to answer. The phone is obviously a prop.
Howard Borden: I was, uh, just decorating my Christmas tree and I was wondering, is there a trick to stringing cranberry sauce?
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