Bastard son Arthur returns to the land he's been banished from to find a kingdom in chaos. Seeking the aid of his oldest confidants, Arthur aims to right Britain's path as he faces the most unexpected of obstacles.

Iain De Caestecker, Stuart Campbell, Ellie James, Steven Elder, Valene Kane, Simon Merrells, Ken Nwosu, Olumide Olorunfemi, Billy Postlethwaite, Daniel Ings, Nathaniel Martello-White, Eddie Marsan, Jordan Alexandra