Helios is the tertiary antagonist of the fourth season of the BBC series, Merlin. He is the leader of the Southrons, a group of mercenaries who helped Morgana take over Camelot a second time and becomes her right hand after Merlin killed Lord Agravaine. However, Helios is killed by Isolde in battle (who he also kills as well) and Morgana had been depowered by Merlin from the night prior.