While practising not being frightened, Ronja is chased. Later, at Hell's Gap, she sees something unexpected.
| Title | Hearing the Whistler |
|---|---|
| Genres | Comedy Animation Family Action & Adventure |
| Release Date | 2014-10-25 |
| Episode Runtime | 00 Hours 25 Minutes |
| Season Number | 1 |
| Episode Number | 4 |
| Production Companies | NHK, NHK Enterprises, Dwango, Polygon Pictures |
