The Disappearance of Conan Edogawa: The Worst Two Days in History ( Edogawa Conan Shiss Jiken Shij Saiaku no Futsukakan?) is Detective Conan's fifth TV Special. It's a piece created to commemorate the 20th anniversary of Detective Conan manga serialization. This episode is based on the famous case of Agatha Christie's disappearance in 1926, and director Kenji Uchida collaborated with Gosho Aoyama to create a crossover that introduces Conan Edogawa and the many characters in the plot of his 2012 film Kagi Dorobo no Method.