Morten Steingrimsen Guest ContributorPeter Mullan (“Westworld,” “Top of the Lake”) and Charles Dance (“Mank,” “The Crown”) have joined the cast of “The Hanging Sun,” based on Jo Nesbø’s bestselling novel “Midnight Sun.”Frederick Schmidt (“Angel Has Fallen”) and Raphael Vicas (“Grantchester”) are also boarding the production.The Sky Original film is a U.K.-Italian co-production from Sky, ITV Studios’ Cattleya and Groenlandia.