In this clip, Charlie uses fractal dimension to detect forged comics. He argues that forgeries take longer to draw, causing ink to seep out in a way that increases "wrinkliness", which can be measured by fractal dimension.
The narrator explains to Donald the story of Pythagoras, who is considered by some to be the father of mathematics and music. He discusses Pythagoras' society, the Pythagoreans, and how they used mathematics to create music.
Bad Man poses two word problems to Ashley and Celia. Given a start and an end time, they need to calculate the duration of a train ride and the length of a video recording.