If, like my wife and I you've been gripped by Danish TV show Forbrydelsen (the Killing), then you've more likely than not been spending more time than you would ever have thought possible staring at a certain chunky knit jumper. Now, during the show's early run in March of this year (2011) on BBC4, you might have been forgiven for paying it no more than a passing interest, however - if like our family, you've just caught on to the series at it's second showing as the nights are drawing in then you're no doubt thinking - "oooh, that jumper looks nice and warm"