Doctor Who Series 9 continues this weekend with The Witch's Familiar - and sees the Doctor surrounded by his deadliest enemies, the Daleks, and faced with a tough decision that could change the whole of time and space.

Trapped and alone in a terrifying Dalek city, the Doctor is at the heart of an evil Empire: no sonic, no TARDIS, nobody to help. With his greatest temptation before him, can the Doctor resist? And will there be mercy?

The BBC has released this clip of the forthcoming episode, with Peter Capaldi's Twelfth Doctor lashing out at Davros (Julian Bleach).

In our review of The Magician's Apprentice, we particularly praised Bleach:

"It's been seven years since he last played Davros (in 2008's Journey's End), but he slips back into the role effortlessly. His dialogue with the Doctor is naturally electric, and the two bounce off one another perfectly. He immediately cuts down the Doctor's assertion that the Daleks should never have been created with a simple line, accusing him of being a broken record: 'This is the argument we've had since we met.'"

The Witch's Familiar airs on Saturday 26th September, on BBCOne, at 7:45pm.