2x21 An Early Spring
First Aired: Mar. 20, 1986 on NBC
Summary: Theo and Cockroach study for an important math test, and when their teacher, Mrs. Westlake, is hospitalized, they are worried for her, and happy that they will get extra time to study. Meanwhile, Cliff gets frustrated when teaching Rudy to ride a bike, while Clair does it with ease, and…
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- Goof (revealing mistake): While Mrs. Westlake is sitting on the steps talking to Claire, the rims of her glasses reflect light, but not the lenses. Obviously, there are no lenses!
- Goof (continuity error): In all establishing shots of the Huxtable house, it seen as being in the middle of a group of houses, with fences on either side of the front steps. In episode #2.21 ("An Early Spring") some scenes take place on the Huxtable's front steps. In these scenes, there is a driveway the the left of the steps, and to the right of the house there is an alley.