Action adventure based on Bernard Cornwell's Warlord Chronicles, a book series retelling the legend of King Arthur. Set in the fifth century, a brutal time of tribes and warring factions, the drama follows warrior Arthur Pendragon, who is cast out by his father the king - unaware he is destined to one day take his place. Iain De Caestecker stars as the future king, with Eddie Marsan, Ellie James, Nathaniel Martello-White and Stuart Campbell