And so it seems the Prophets did not lie. As the great battle rages on Camlann's mighty plain, Merlin faces his moment of destiny. Can he find the strength to save the man he made a King; the Camelot they fought to build; and the brotherhood they shared?

Cast: Colin Morgan, John Hurt, Rupert Young, Alexander Vlahos, Tom Hopper, Katie McGrath, Richard Wilson, Angel Coulby, Barry Aird, Eoin Macken, Erin Richards, Bradley James