his great secret: He is from the planet Vinci, which is populated by a humanoid, near-immortal, highly intelligent alien race that takes pleasure in education. Farnsworth is elated, and runs off to explore and learn. Fry confesses his stupidity to Leonardo, who sympathizes and says that he is actually the dumbest person on planet Vinci, and lived on Earth during the Renaissance because he could not withstand the continuous bullying from his race. Earth's relatively stupid inhabitants were also intolerable to him, so he eventually returned to Vinci. Leonardo mentions the lost plans for his Machina Magnifica, which Fry happens to be carrying, and Leonardo takes them happily. Fry helps Leonardo build the Machina Magnifica, under the assumption that they are plans for an ice cream machine. Farnsworth is having difficulty keeping up with the academic rigors on Vinci, and is ridiculed for his relative stupidity. Leonardo eventually reveals that his Machina Magnifica is a doomsday device, and attempts to use it on all those who tormented him. Fry is appalled at the machine's true purpose and tries to sabotage it, only to jam the gears when he falls in among them. The people of Vinci laugh at the failed machine, and Leonardo defiantly pulls a lever and is killed by a giant cog that falls on him. Farnsworth and Fry fly home in Leonardo's ship, and Farnsworth clumsily apologizes to Fry for insulting his intelligence. Cultural references The basic plot and title of the episode is a parody of The Da Vinci Code. They also make a reference to Achilles' Heel and Who Wants to Be a Millionaire?. Reception In its original broadcast on Comedy Central, "The Duh-Vinci Code" was viewed by an estimated 2.204 million viewers (up nearly 200,000 or 10% from "Proposition Infinity") with a 1.5 household rating and a 1.1 rating in the 18-49 demographic, up 1/10 of a point from the previous week and making it the 3rd highest rated episode of the season behind premiere week's doubleheader of "Rebirth" and "In-A-Gadda-Da-Leela". Robert Canning of IGN gave the episode an 8.0/10 stating in his review "As wary as dated references and repurposed story ideas have been making me feel, it's hard not to enjoy an episode of Futurama that can deliver fun twists and an unexpected Achilles' Heel gag." Zack Handlen of The A.V. Club gave a B and also said in his review "Generally,