Beakman breaks down the meaning of the word to aid in remembering what it means. Once explaining that molecules make up water, he uses an animated clip to liken molecules to cars racing around. He shows the different speeds of the cars in hot vs. cold water and how they balance out if put together. Then there is a song about thermodynamics.
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.
When Mark loses power on Mars, he scavenges the Rover 1 to double his battery life. It is freezing cold, and he is faced with a dilemma: use the heater to stay warm and burn through half his battery every day, or slowly die from the cold to save battery life.