Three boys are investigating a ruins of the old fortress during summer vacations.
| Title | Season 1 |
|---|---|
| Genres | Action & Adventure Family |
| Air Date | 1970-12-01 |
| Episode Runtime | 00 Hours 30 Minutes |
| Season Number | 1 |
| Episode Count On Season 1 | 7 |
| Production Companies | Zespół Filmowy "Kraj" |
