December 1, 1970
Season 1
Three boys are investigating a ruins of the old fortress during summer vacations.
01. Episode 1
Three boys are investigating a ruins of the old fortress during summer vacations.
30min
December 1, 1970
02. Episode 2
Three boys are investigating a ruins of the old fortress during summer vacations.
30min
December 18, 1970
03. Episode 3
Three boys are investigating a ruins of the old fortress during summer vacations.
30min
January 3, 1971
04. Episode 4
Three boys are investigating a ruins of the old fortress during summer vacations.
30min
January 18, 1971
05. Episode 5
Three boys are investigating a ruins of the old fortress during summer vacations.
30min
February 4, 1971
06. Episode 6
Three boys are investigating a ruins of the old fortress during summer vacations.
30min
February 28, 1971
07. Episode 7
Three boys are investigating a ruins of the old fortress during summer vacations.
30min
March 18, 1971