S01E136 The Old Blue Castle Investigation Case (1)

• Sezonul 1, episodul 136
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• Difuzat luni, 22 februarie 1999
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• 25 min

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.