- 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 (voice))
- Chafurin (Juzo Megure (voice))
Detective Conan — S1E340
Episode: The Secret Hidden in the Bathroom (1)
Air Date: 2003-11-03
Runtime: 25 min
Overview
This episode reveals bits and pieces of Ai's family. Ai knows very little about her parents, and considers her mother a cold and mysterious woman, nicknamed Hell Angel by the Organization. Professor Agasa then brought Conan and her to the house of her father's old friend, who is also a professor. Later, after leaving the bathroom, that professor is murdered, leading Ai to believe the Black Organization is behind it.