Three boys are investigating a ruins of the old fortress during summer vacations.
| Title | Episode 4 |
|---|---|
| Genres | Action & Adventure Family |
| Release Date | 1971-01-18 |
| Episode Runtime | 00 Hours 30 Minutes |
| Season Number | 1 |
| Episode Number | 4 |
| Production Companies | Zespół Filmowy "Kraj" |
