Dark forces are amassing, Camelot is under siege and our heroes are on the run. Merlin (Colin Morgan) and Arthur (Bradley James) turned to smugglers Tristan (Ben Daniels) and Isolde (Miranda Raison) for help, but will they be able to escape Morgana's clutches?
> Merlin: 'The Sword in the Stone (Part 1)' in pictures
> Merlin: 'The Hunter's Heart' recap
Check out Digital Spy's ten teasers for this week's Merlin below:
1. First off, the title is a little misleading - there's no sign of the eponymous sword this week!
2. "I'm hardly going to look kingly in my undergarments, am I?"
3. The King begins to wonder just why he's so unpopular.
4. "It seems your worst fears have been realised, Merlin."
5. There's more than one reunion on the cards!
6. "No-one likes to be called fat."
7. Arthur is a tree-hugger.
8. "We're too quick and too smart for the half-wit king in Camelot."
9. Don't mess with Gwaine - especially when he's tired and hungry.
10. "Sorry Merlin - some of these things are a little on the tight side!"
What do you make of our teasers? Let us know below!