Digital Spy has seen the impressive premiere and as ever is on hand with ten cryptic hints about what to expect - feast your eyes on our magical teasers!
Merlin returns to BBC One this Saturday (October 6) at 7.45pm.
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1. Merlin (Colin Morgan) has some rather impressive hidden talents.
2. "Lady Morgana… we really have to stop meeting like this."
3. The Great Dragon (John Hurt) makes another appearance to dish out some wisdom.
4. "One thing is certain - this was no chance meeting."
5. Fans of the Knights are in for a treat - just wait, you'll see what we mean!
6. "I'm not a fool."
7. There's a scene that recalls a moment from the first Lord of the Rings film.
8. "What about *********** an ass?!"
9. At one point, Merlin and Arthur become... entangled.
10. "You can't ride a pig."
Are you excited for the return of Merlin? Let us know below!