The Key in the Water Locked Room Case Kogoro, Ran, and Conan pay a visit to an old woman. She decides to take them to her grandson, but he's found dead when they get into the house. The bathroom door is locked however. How could this have happened? Details Casts Title The Key in the Water Locked Room Case Genres Animation Crime Mystery Comedy Release Date 1999-08-02 Episode Runtime 00 Hours 25 Minutes Season Number 1 Episode Number 155 Production Companies TMS Entertainment, Kyokuichi-Tokyo Movie Minami Takayama Conan Edogawa (voice) Kappei Yamaguchi Shinichi Kudo (voice) Wakana Yamazaki Ran Mouri (voice) Akira Kamiya Kogoro Mouri (voice) Rikiya Koyama Kogoro Mouri (voice) Megumi Hayashibara Ai Haibara (voice) Kenichi Ogata Hiroshi Agasa (voice) Yukiko Iwai Ayumi Yoshida (voice) Wataru Takagi Genta Kojima (voice) Ikue Otani Mitsuhiko Tsuburaya (voi? Chafurin Juzo Megure (voice)