Detective Conan Episode 636, "The Most Useful School in the World Case (Part 1)," features a unique crossover with a real-life Japanese educational program, focusing on the theft of a priceless vase during a television studio rehearsal. While investigating the locked-room mystery, Conan uncovers that the stolen item was a counterfeit, turning the investigation into a case of potential reputation protection rather than simple theft. This anime-original episode features Kogoro Mouri as a guest star and serves as a non-murder, plot-filler entry. For a detailed summary of the episode, visit Detective Conan World . The Most Useful School in the World Case