Case Closed

Season 1, Episode 136

Episode Title: The Old Blue Castle Investigation Case (1)

Air Date: 1999-02-22

Overview:

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.