S01E155 The Key in the Water Locked Room Case

• Sezonul 1, episodul 155
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• Difuzat luni, 2 august 1999
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• 25 min

Kogoro, Ran, and Conan pay a visit to an old woman. She decides to take them to her grandson, but he's found dead when they get into the house. The bathroom door is locked however. How could this have happened?