Bill Nye explains that heat is energy and can be used to do work, such as keep up warm, run an engine, or affect other molecules. Using real-world examples, he then describes the three ways that heat can move from one place to another: conduction, convection, and radiation.
Kramer and George go out to dinner, and Kramer, on behalf of George's girlfriend, Allison, talks about their relationship. Allison wants to break up with George. In his disappointment, George speaks to Kramer as if Kramer is Allison.
Byron kisses his reflection in a frozen car window and gets his lips stuck to it. He pleads to Kenny for help, and Kenny thinks he's attempting to trick him again. Kenny learns that Byron is serious and gets his parents to help.