A mathematician offers to sell his soul to the devil for a proof or disproof of Fermat's Last Theorem. Based on "The Devil and Simon Flagg" by Arthur Porges.

Based on the book “The Ambidextrous Universe” by Martin Gardner. An eccentric professor explains whether our idea of ​​the symmetrical structure of the universe is still valid and invites the viewers into the world of elementary particles

The self-taught inventor Kostylin, convinced of the expediency of his latest work, this time decided to seek recognition to the end.

Once upon a time, young scientists Kalitin and Danilov were friends, but a quarrel separated them. The circumstances of the quarrel remained unclear to everyone until the end. But everyone thought they were right. Years have passed. Professor Kalitin’s son, working under his leadership, moves to the institute headed by Danilov. Kalitin learns about this decision of Igor on the day of the arrival of his friend and colleague Vasin. On this occasion, old friends gather at the professor’s house, including Luzgin, Kalitin’s boss. Reflections on his life help the professor understand his son’s choice, oppose the unprincipled careerist Luzgin and make peace with Danilov.

A physicist, a director of popular-science films, and a sports fan talk about the structure of the atom between periods of a hockey game they watch on TV.