Debatably the most kick-ass theme tune on TV, Frans Bak’s cracking theme is driving and relentless, with a mournful female voice over the top adding a sliver of soul. It is not the only memorable piece of music in the show: listen out for the plinky-plonky theme that appears every time Lund has an epiphany.

“We wanted it to be something that was repeating itself, not having any song in it. Sometimes you can create relief in the audience by playing a beautiful song and ending it all with a small smile. As I said before, the characters are trapped and I wanted it to be cynical. Of course, it should be a moody tune but it should be repeating itself so they couldn’t get out of the box so to speak. The audience should have that feeling too. The composer Frans Bak also had a lot of songs that we could have used but it didn’t seem the right thing to do with the genre. We don’t have any lyrics. The music should just be used to enhance the feeling of being in this bubble which you can’t get out of only when the resolution is there after 20 episodes.”