‘Merlin: The Hollow Queen‘ airs, Saturday 24 November at 8.00-8.45pm on BBC One.

When Merlin agrees to help a young Druid boy, Daegal, he has no choice but to leave Camelot on a dangerous mission.

And with the citadel distracted by the visit of the fearsome Sarrum of Amata, it seems that no one will notice his absence. But as the sky darkens so do Merlin’s suspicions – is there more to Daegal than meets the eye? And can a man as ruthless as the Sarrum ever really be trusted? Before long, the young warlock realises he’s made a terrible mistake.

Colin Morgan is Merlin, Bradley James is Arthur, Angel Coulby is Gwen, Katie McGrath is Morgana, Richard Wilson is Gaius and John Hurt is the voice of the Great Dragon. Tom Hopper, Rupert Young, Eoin Macken return as The Knights of the Round Table. Special guest stars include John Shrapnel as Sarrum, Matthew Clancy as Albin, Alfie Stewart as Daegal, and Mitch Benn as Gerrin.

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