Linus' class gives a presentation on America's great inventors, from the creation of the telephone to the electric light. Linus starts by talking about the invention of the telephone.

Flint's mother gives Flint encouragement when he's feeling down. She suggests he follow the example of great inventors, such as Nikola Tesla and Alexander Graham Bell, who weren't deterred by what other people thought of them. Flint then gets back to work on new inventions.

Beakman explains how landline phones work by turning sound waves into electricity and back into sound again. He acts like Alexander Graham Bell to explain it, uses an animation clip, and then does a demo with the transducers of the phone to prove it.