There was a time when we’d have felt withdrawal symptoms over the absence of The West Wing or The Sopranos, or The Wire; invariably it was American television that had its hooks in us. Now it’s Danish. And it’s time for a fix. Cue The Killing, which returns to add its own particular chill to the winter.

Lord Bragg permitted himself a knowing chuckle as he introduced Sky Arts's resurrection of The South Bank Show from the South Bank. He was standing in front of the National Theatre, whose director Nicholas Hytner was this week's subject, though within seconds he had been teleported to the streets of Manhattan, to preview the opening of Hytner's production of One Man, Two Guvnors on Broadway. The message, from both Bragg and Hytner, was that the arts are vital, they can be massively popular, and they cross frontiers both imaginative and physical.

It ended where it began, between Copenhagen and Malmö along the Öresund bridge. The journey back to square one took in issues of homelessness, mental health, immigration and child labour. Drug abuse, national identity, family break-up and the power of the media cropped up too. But none of these are what The Bridge hinged on. Without its main characters and measured pace, The Bridge could have been little more than a bleak trudge through society’s ills.

People speak to her. It could be her mother. It could be a colleague. But she doesn’t react, continues what she’s doing. Which, usually, is leaving. It’s welcome back to Sarah Lund, whose watchability is in inverse proportion to her demonstrativeness. As recalcitrant detective Lund, in the second series of Denmark’s The Killing, Sofie Gråbøl is as magnetic as the first time around, whatever she’s wearing. Sweaters be damned, these two opening episodes were up there with the BAFTA-winning first series.