The on-stage collaboration between north-Norwegian ambient maestro Biosphere and his similarly inclined but sonically darker countryman Deathprod was a one off. At Oslo’s Tape to Zero festival, Biosphere and Deathprod bought the you-had-to-be-there moment. The pair had collaborated for a remix project of composer Arne Nordheim in 1998, but this was about new music.

Well, that was a bit of a brain workout for the first episode - I confess for much of the opening instalment (five more to follow) I didn't have a clue what was going on, who anybody was or how all the characters and a multitude of story strands were connected. Actually, I'm not sure I did entirely understand by the end, but by then the Norwegian thriller set in the nebulous area where politics, finance and journalism collide had drawn me in sufficiently to tune in next week.

The British Museum's exhibition The Vikings: Life and Legend promises to redefine the Viking age for a new generation. First seen at the National Mueum in Copenhagen, it has now travelled - much as the show's subjects once did - across the North Sea. It includes objects from 25 lending institutions spread across nine countries - 10 if you include Scotland, whose national law requires export licence. To celebrate the exhibition, theartsdesk invited Dr Gareth Williams to pick 10 exhibits that walk us through the Viking story.

Back at the Venice Biennale in 2010, the German film director Wim Wenders showed a 3D video installation titled “If Buildings Could Talk”.

Stellan Skarsgård is having a good Berlinale. The veteran Swedish actor proved the main calming influence in Lars von Trier’s Nymphomaniac Volume One (***), which the Berlin festival screened as a world premiere in the director’s version, running at 145 minutes. That’s about 25 minutes more than the UK will be seeing from 21 February, when both parts of the work will be released.

Oslo is a winter wonderland, and adults seem to be outnumbered by children, flocking from all over Norway to Disney on Ice. It’s the deep snow and the silence in pockets of the city rather than the kids which make me wonder if anyone has set Handel’s Alcina in the icy lair of C S Lewis’s White Witch, with hero Ruggiero as Edmund fed Turkish delight from the magic phial. There's even a captive lion. Francesco Negrin’s straightforwardly magical production - look, no metatext!

How come there is always a free parking space right outside the police station’s front door as Saga Norén draws up? If she has malodourous armpits, what must her manky leather trousers smell like? What does her partner in investigation Martin Rohde do to distract himself from her personal hygiene issues? Wouldn’t he do better to downsize his expensive car and use the money saved on renting an apartment rather than kipping in a hotel? All burning questions raised by the second series of the Danish-Swedish co-production The Bridge, currently being aired by BBC Four.

Four days in Norway’s capital attending Folkelarm, the festival of Nordic folk music, raises the perennial and always knotty question of how far music can move beyond the traditional yet still be labelled as folk? With the charming and reassuringly old-fashioned accordion- and string-driven dance band the P. A. Røstads Orkester there’s no such problem. But Slagr, despite the presence of a rootsy Hardanger fiddle in their ranks, are closer to the drone of La Monte Young’s eternal music and could never liven up a Saturday night dance.

In the listening room of Grieg Hall, Bergen, a concert hall sometimes masquerading as a theatre and vice versa, I talk to Mary Miller, director of Bergen National Opera, and Andrew Litton, music director of the venerable Bergen Philharmonic Orchestra - about the genesis of opera in Bergen and the prospect of the big autumn production - Beethoven’s cry for freedom and political tolerance, Fidelio - which will serve as an upbeat to the 200th anniversary of the establishment of Norway’s constitution in 2014.

May I be permitted a rude, opinionated intermezzo between reflections on Vasily Petrenko’s two Oslo Philharmonic Proms, and before Marin Alsop steps up to great expectations for the Last Night?