Now fully in possession of the facts, ruthless sorceress Morgana (Katie McGrath) has declared open war on Camelot and on Merlin (Colin Morgan). Without his faithful servant at his side, Arthur (Bradley James) must fend off the enemy hordes and lead his knights to victory - but is he advancing ever closer to his doom?
Merlin continues on BBC One this Saturday (December 22) at 7.55pm.
> Merlin: Next episode 'The Diamond of the Day (Part 1)' in pictures
> Merlin: New episode 'The Drawing of the Dark' review
1. "Enjoy this moment, Merlin, while it lasts…"
2. Expect plenty of nods to the show's past and fan-pleasing moments.
3. "You have defied me for the last time, Emrys."
4. A character we haven't seen since series two makes a surprise return.
5. "The fate of the kingdom will be decided here."
6. For a wizard, there are worse things than death.
7. "Believe what your heart knows to be true."
8. The knights play a larger role this week - Tom Hopper, Rupert Young and in particular Eoin Macken all get more screen-time.
9. "We fight for the future - the future of Camelot, the future of Albion…"
10. Morgana confronts 'Emyrs' for the first time since learning the truth...
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