During a trip with Clara to the end of the universe, the Doctor comes face to face with something that chills him to the bone. But what could frighten a man who has spent most of his very long life battling the galaxy’s most terrifying aliens?
Meantime, I hope you didn’t forget the next time trailer for this episode of Doctor Who.
What’s that in the mirror, or the corner of your eye?
What’s that footstep following, but never passing by?
Perhaps they’re all just waiting, perhaps when we’re all dead,
Out they’ll come a-slithering from underneath the bed….