Johnny Capps Creator Julian Jones Creator Jake Michie Creator Julian Murphy Creator Colin Morgan Merlin Actor Bradley James Arthur Pendragon Actor Anthony Head Uther Pendragon Actor Richard Wilson Gauis Actor Angel Coulby Gwen Actor Katie McGrath Morgana Actor John Hurt The Great Dragon Voice Michelle Ryan Guest Star Clive Russell Guest Star Gary Oliver Guest Star Jamie McKenna Guest Star Paul Kynman Guest Star Ed Fraiman Director Ben Vanstone Writer