Detective Conan › Season 1

S1 E136: 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.

Air date	Feb 22, 1999
Runtime	25 minutes
TMDB rating	★ 7.5/10