Sky has picked up “ Cookster : The Darkest Days,” a British crime drama starring Nick Moran that will reach U.K. and Ireland audiences following a successful festival run that netted multiple awards. The project marks a deeply personal endeavor for writer-producer Jason Cook, who drew from his own experiences to craft a story covering more than a decade. Set between 1981 and 1993, the narrative traces how a teenager struggling with dyslexia and bullying finds his way into the drug trade, only