Cold-case crime drama with a Nordic twist

In this second Danish series involving criminal profiler Louise Bergstein (Natalie Madueño) she is tasked with tracking down a killer who tortured and murdered young men five years ago, one the son of a terminally ill friend. The culprit – identified early on – starts up his spree again when his wife departs, leaving him with a young son. What is his motive? A slick, watchable drama that makes a welcome change from the many thrillers strewn with the bodies of women. BBC iPlayer, available now