Watch Series: Brødrene Dal og professor Drøvels hemmelighet Released in (1979) - Season 1 produced by No, NO, The TV Series categorized in Action, Adventure, Comedy, Drama, and content rating TV-PG with duration 15 min broadcasted as these networks NRK1, NRK, Streamed at Putlocker & directed by Eivind Aaeng. In 1950 professor Kurt Drøvel vanished while exploring the unchartered river Overfloden outside of Oslo, Norway. All rescue attempts failed. 28 years later, the brothers Dal have started a journey, by canoe, up Overfloden, in order to establish what really happened to professor Drøvel. - Season 1