The epic fifth series of fantasy drama Merlin continues on BBC One next weekend and high in the mountains, a great horde gathers; Morgana prepares for war with a vengeful Mordred at her side.

Merlin feels the weight of his destiny like never before as the ancient prophecies play out with terrifying accuracy. But before he can save his beloved Camelot, he must save himself. For it is not just the kingdom Morgana wishes to destroy – it is also Emrys.

‘The Diamond of the Day (Part One)’ airs at 7.55pm on Saturday 22 December on BBC One. To whet your appetite, here are ten hints for the episode…

» Prepare for some Alien-style action!

» Who will receive a dangerous gift?

» ‘Gently, Mordred, can’t speak with her throat cut out now, can she?’

» Which member of Camelot’s finest will watch a battle of wits at the Tavern?

» Who will demonstrate an uncanny ability to hit a moving object?

» Medical supplies will play a vital role.

» Which Knight will be lucky in love?

» A couple holding hands will create more than just a warm feeling.

» Who will be the first to name the place of the final battle?

» Creeping quietly is clearly not one of Merlin’s many talents.

» ‘I knew you’d discover my secret in the end…’

> Order the complete Series 5 DVD boxset on Amazon.

Are you looking forward to the episode? Let us know below…