An ambitious filmmaker sets out to make an avant-garde film but soon learns the only way he can secure financing is if he shows Jessica Hahn's breasts. Also, two old women are magically transformed into young starlets.

An eccentric East German inventor and defector travels to Los Angeles, California to sell a prototype revolutionary new car that runs on vegetables and produces no pollution, but he runs into one madcap situation after another to find a buyer and financier for mass production.

The nerds are now in control of the university, as a result of Lewis Skolnick and the rest's actions in the two previous movies. A new generation of sportsmen arrive, however, determined on winning the school back. The principle, himself an ex-nerd fighter, helps them, and the nerds return to suppression. Harold Skolnick needs help from his uncle Lewis, the hero of the first two movies. Lewis, however, are not too proud of his nerd past, and won't reveal any of it, much less help his nephew. However, his wife makes him change his mind, and with help from his friends from the first two movies, they start the fight to win the school back, using classic nerd tricks.

Tobacco, climate change, pesticides,... Never has scientific knowledge seemed so vast, detailed and shared. And yet it appears to be increasingly challenged. It is no longer surprising to see private corporations put strategies in place to confuse the public debate and paralyze political decision-making. Overwhelmed by excess of information, how can we, as citizens, sort out fact from fiction? One by one, this film dismantles the workings of this clever manoeuvre that aims to turn science against itself. Thanks to declassified archives, graphic animations and testimonies from experts, lobbyists and politicians, this investigation plunges us into the science of doubt. Along with a team of experts (philosophers, economists, cognitive scientists, political men, or even agnotologists), we explore concrete examples of doubt making and try to understand the whole process and the issues behind it.