1 Season
1143 Episode
Case Closed - Season 1 Episode 136 The Old Blue Castle Investigation Case (1)
The Detective Boys are on a camping trip but Dr. Agasa forgot the tent. They wander to a castle owned by Masuyo Mamiya, meet Katsuo Tabata, Mitsuru Mamiya, Takahito Mamiya, and learn that there's a secret treasure somewhere inside.
- Year: 2024
- Country: Japan
- Genre: Animation, Mystery, Comedy
- Studio: YTV
- Keyword: japan, detective, secret identity, high school, cop, based on manga, mysterious, anime, age change, case, adventure
- Director:
- Cast: Minami Takayama, Kappei Yamaguchi, Wakana Yamazaki, Akira Kamiya, Rikiya Koyama, Megumi Hayashibara