It was hugely successful at the time, causing many invented phrases from the series to enter popular culture[1] and was later released on VHS and subsequently DVD.
Gammelnok gathers three of the remaining Nisser (Hansi, Günther, and Fritz (all distinctly German names)) and sends them off to Denmark, to find the old Nisse cave where the key to wind up the music box is.
Examples of particularly interesting, odd, or funny phrases are listed here (without an understanding of Danish, the humour will likely be lost): Additionally, key characters, events, or items are also called by odd hybrid names: the music box, for example, is a play dåse, Father Christmas is the Christmas man and the act of wood-carving is called "snitting".
Another large part of the appeal are the highly stereotypical Danes that the same three actors also play: Oluf and Gertrud Sand, a country bumpkin couple that live and work on a potato farm in Jutland, and Benny Jensen, a travelling salesman (or so he claims) from Copenhagen (who turns out to be a Nå-såer).
There is also a large clash between the two different ways of life (as Benny comes to move in with Oluf and Gertrud in an early episode, as his car runs out of petrol, punctures, breaks down completely, and then gets stolen, supposedly by the "Polish Mafia").