Check out Digital Spy's ten teasers for this week's Merlin below:

1. "I've been playing a dangerous game since the first time I set foot in Camelot."

2. The prince is not too happy with the "entertainment" at his birthday feast.

3. "I think that a lot of sorcerers are in the charcoal business."

4. The elderly Merlin returns and confronts Arthur once more!

5. "You've got *******, ******** and ******** to entertain you!"

6. At one point, Arthur forgets to put on his trousers.

7. "I take it you didn't come all this way just to smash my favourite pot!"

8. Arthur begins to suspect that there is something wrong with Merlin's bladder.

9. "Finally you will get all that you deserve, old friend."

10. Arthur gives Merlin a piggyback ride.