Case Closed: Episode One - The Great Detective Turned Small

Case Closed: Episode One - The Great Detective Turned Small | Meitantei Conan Episode "ONE" Chiisakunatta Meitantei | 名探偵コナン エピソード"ONE" 小さくなった名探偵 | Detective Conan Episode "One" Chiisakunatta Meitantei | Detektiv Conan: Episode ONE - Der geschrumpfte Meisterdetektiv

A special commemorating the 20th anniversary of the anime series. The special is a retelling of how Kudo Shinichi was transformed into a child. (Source: Anime News Network)