Bill introduces the ancestor of the modern clock: the sundial. He illustrates how it uses shadows to indicate the time of day and explains how it influenced the clock. A time lapse then shows how the sundial and clock are in sync as the hours go by during the day.
When an important package is passed on to Homer, he delivers it to Mr. Burns, the sender of the package. Mr. Burns then releases a disappointing booby trap; he is not well-versed in the metric system.