Long ago, there was a time when the British comfortably basked in the assumption that their television drama was the best in the world and that the European small screen was dominated by silly quiz shows and people playing apparently incomprehensible practical jokes on each other. But that was before 2011 and the arrival on our screens of the first series of The Killing, the Danish noir drama of murder, corruption and politics. Its huge success opened the door to dozens of similar thrillers of dark political machinations and maverick police-people set in Sweden, Iceland and France. Who knew that Borgen would make Danish coalition politics so gripping?

The latest continental arrival is I Know Who You Are, a Spanish thriller set against the background of the legal and judicial system.