Season 1
7 episodes · premiered Dec 1, 1970
Three boys are investigating a ruins of the old fortress during summer vacations.
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E1 Episode 1
Three boys are investigating a ruins of the old fortress during summer vacations.
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E2 Episode 2
Three boys are investigating a ruins of the old fortress during summer vacations.
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E3 Episode 3
Three boys are investigating a ruins of the old fortress during summer vacations.
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E4 Episode 4
Three boys are investigating a ruins of the old fortress during summer vacations.
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E5 Episode 5
Three boys are investigating a ruins of the old fortress during summer vacations.
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E6 Episode 6
Three boys are investigating a ruins of the old fortress during summer vacations.
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E7 Episode 7
Three boys are investigating a ruins of the old fortress during summer vacations.