Merlin’s adventures continue with episode 10 of Series 4 entitled A Herald Of The New Age. Plot details and trailer follow.

The Camelot Knights stumble across an eerie shrine deep in the forest, its chilling atmosphere betraying a dark history best left undisturbed. But when Elyan ignores Merlin’s warning, his actions spark a chain of events more frightening than anyone could possibly have imagined… Can a grievous wrong be put right? Or will past demons change the future forever?

httpvh://www.youtube.com/watch?v=pQUDxhRi8yU

It airs Saturday 3 December at 8.15pm on BBC1.