If you saw a movie DVD on the shelf with the title "Fermat's Room", you'd surely have to watch it. There is indeed such a movie, and it is a mystery thriller involving mathematicians trapped in a small space. The movie begins with the assertion that you should leave if you don't know what a prime number is, and the first scene has an accessible explanation of Goldbach's Conjecture. Intriguing invitations to a mathematics gathering follow, and before you can finish "An elementary proof of the prime number theorem", the characters are in a seemingly pleasant remote location, anticipating a collegial workshop. Instead, they face death by mechanical presses as the room relentlessly contracts. Only by solving puzzles and entering the answers on a PDA can they delay their fate. The puzzles are ones you've heard before, and the group plows through them in valiant fashion, but they realize that they need to understand why they are in this predicament in order to save themselves. This leads to a multi-level problem solving session in which the characters try to analyze the puzzles, the mechanics of the room, how they came to be selected for this bizarre punishment, and who might be behind the plot. All the while the room gets smaller and smaller. As it turns out, the whole situation might be a cynical metaphor for megalomania of pursuit of mathematical glory. The immense rewards and adulation that would be the mantle of the one to prove Goldbach's Conjecture can cause an implosion of a person's moral center. As we have seen time and time again, mathematical discovery corrupts, and discovery of absolute quantities corrupts absolutely. Or something. At the end, one character makes the astonishing claim that the world is the same whether or not Goldbach's Conjecture is known to be true or not. Say what? The people behind this film must have been ... well, physicists or something. "Fermat's Room" is a movie that is just quirky enough to be entertaining. Rugged individualists will appreciate the graphic argument against seatbelts. For extra credit, watch it without subtitles (it's in Spanish).