This weekend, the Doctor comes face-to-face with the terrifying Fisher King..

Anyone else getting a Curse of Fenric (1989) vibe?

In last Saturday's Under the Lake, the Doctor and Clara were up against mysterious ghosts chanting four words over and over again under their breath. Now, separated from his companion, the Doctor has gone back in time to see if he can find out more about the major threat on this underwater base.

On a remote Army outpost, a fearsome alien warlord – the Fisher King – sets in motion a twisted plan to ensure his own survival. The ripples will be felt around the universe. Is this chain of events inevitable? And can the Doctor do the unthinkable?

Here's a brief clip to whet your appetite, with Peter Capaldi's incanration of the Time Lord alongside O'Donnell (Morven Christie) and Bennett (Arsher Ali).

In our review, we called Under the Lake "a triumph", and added:

"Please excuse such untempered enthusiasm for Under the Lake, but it's already become my favourite Twelfth Doctor story so far. Considering it's got competition from Mummy on the Orient Express and Flatline (2014), that's a great feat."

Before the Flood airs on Saturday 10th October 2015 on BBCOne, at 8:25pm and concluding at 9:10pm.