Doctor Who Series Finale - Spoiler Pictures

Included here are two images from this year's series finale. BE WARNED: the images are SPOILERY.  Here's a synopsis from Steven Moffat :

A message on the oldest cliff-face in the universe, a puzzle box opening from the inside and a love that lasts thousands of years... The fates are drawing close around the TARDIS - is this the day the Doctor falls?

"There was a goblin. Or a trickster, or a warrior. A nameless, terrible thing, soaked in the blood of a billion galaxies. The most feared being in all the cosmos. Nothing could stop it, or hold it, or reason with it - one day it would just drop out of the sky and tear down your world."

Source:  BlogtorWho