Johnny Capps Creator Julian Jones Creator Jake Michie Creator, Writer 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 Victoria Finney Guest Star Charles Dance Guest Star Katie Foster-Barnes Guest Star Amanda Fairbank-Hynes Guest Star Samara MacLaren Guest Star Rupert Young Guest Star David Sterne Guest Star Jeremy Webb Director