The Queen of Camelot has turned to the dark side, but is her new allegiance the result of black magic or are there other forces at play? Merlin soon learns that he will have to go above and beyond to save his friend - believe us when we say that the show is heading into unexplored territory!
Merlin continues on BBC One this Saturday (December 1) at 8.00pm.
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1. Prepare for a gob-smacking surprise in the very first scene!
2. "If she is tricked, forced or beguiled, she will fall into the abyss."
3. An iconic magical item makes a long-awaited reappearance - go on, take a guess!
4. "You underestimate the power of love, Merlin."
5. Two characters with a complex history share an awkward reunion.
6. "Sorcery has to be fought with sorcery."
7. Buried emotions come boiling to the surface this week, on several fronts...
8. "Who dares enter the sacred cave?"
9. We see a whole new - very different - side to Merlin.
10. "One day he will know... one day we will be accepted."
Are you excited for the next episode of Merlin? Let us know below!