Inside Number...what was it?

This scene is from the very end of The Harrowing episode of the series Inside No. 9, so spoilers! Actress Aimee-Ffion Edwards plays a house sitter who wakes up to find herself tied to a chair.

And just as something very nasty comes for her (*shutter*). This clip is from Sam, who cut out the more gross and grisly stuff. Try and catch the entire episode if you can, as it's very good (and creepy). You can watch/download it right here.