In the next episode of fantasy drama Merlin‘s fourth series, 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.

A Herald of the New Age airs at 8pm on Saturday 3rd December on BBC One. In the meantime, here are some teasing lines of dialogue from the episode…

» ‘Gaius told me about places like this and they’re cursed.’

» ‘For once I’m not lying to you.’

» ‘Hello? Who’s there?’

» ‘Why have you got stew in your hair?’

» ‘Elyan. I think he’s had enough.’

» ‘When I want your medical opinion Gwaine I’ll ask for it.’

» ‘It would be better if Arthur didn’t know this.’

» ‘You must make him believe you.’

» ‘Well, my sister’s an evil old toad so I’d be eternally grateful.’

» ‘I won’t fail you again.’

> Order the Complete Series 4 boxset on Amazon.

Are you looking forward to the episode? Let us know below…