Hell Bent Preview [SPOILERS!]

[jjpor]

I don't know whether you've seen this already, but I thought I'd post a link to the short clip the BBC have released as a preview of the forthcoming series finale Hell Bent. I'm not sure whether the video will actually work for those outside the UK, but in any case be warned because even the page it's on contains numerous SPOILERS!

SPOILERS AHOY!