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S5-E12 The Diamond of the Day - Part One

S5-E12 The Diamond of the Day - Part One



Fantasy fans: prepare to shed tears, for “the destiny of a great kingdom” is about to be decided. And just as the closing chapters of Harry Potter signalled that playtime was over, so this fifth and final series of Merlin has darkened its approach. And now things get really serious.

High in the mountains, Morgana musters her war-hungry hordes. At her side is her new ally — no Christmas present for guessing who — but Camelot is not her only target. She also means to do away with Emrys the sorcerer, Merlin’s peevish but powerful counterpart. It should be a spellbinding climax on Christmas Eve.


In the penultimate episode of the magical adventure series, Morgana prepares to wage war on Camelot with Mordred at her side, while Merlin finds the burden of his destiny weighing heavily as the ancient prophecies play out with unnerving accuracy. It soon becomes clear that the young wizard must find a way to save himself before he can help his allies bring about the salvation of his beloved kingdom. Colin Morgan, Bradley James and Katie McGrath star.

Cast & Crew

Merlin Colin Morgan
Arthur Bradley James
Balinor John Lynch
Morgana Katie McGrath
Mordred Alexander Vlahos
Gaius Richard Wilson
Gwen Angel Coulby
Eira Erin Richards
Sir Gwaine Eoin Macken
Sir Leon Rupert Young
Voice of the Dragon John Hurt
Sir Percival Tom Hopper
Ari Peter Guinness
Director Justin Molotnikov
Executive Producer Johnny Capps
Executive Producer Julian Murphy
Writer Jake Michie
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