The longest-running BBC series Doctor Who is best known for exploring all kinds of new worlds with all manner of monsters in them. Together with his latest companion, the Doctor voyages across the universe in a time-traveling space ship called the TARDIS, defeating baddies while working to save civilizations and help people in need. For the most part, Doctor Who is a fun science fiction-fantasy series, but sometimes it can get a little scary.

For instance, some of the series' most notorious villains are also the scariest, like the Cybermen, the Daleks, the Silence and of course the dreaded Weeping Angels. First seen in the 2007 episode 'Blink', the Weeping Angels are winged stone statues that can move at incredible speeds, but only when you're not directly looking at them. They can steal a person's life force while trapping them in the past and are quite deadly. They've reappeared multiple times since that first episode, each to terrifying results.

In a surprising move, next week's Doctor Who could see the return of these predatory creatures almost ten years after they first appeared. Written by British playwright and Doctor Foster creator Mike Bartlett, the episode titled 'Knock, Knock' follows new companion Bill (Pearl Mackie) as she and her friends sort out a new roommate situation in a spooky old building. It just so happens that they appear to have chosen to live in the same creepy house from 'Blink' and the new landlord (played by David Suchet) seems to be hiding a secret.

From the trailer above, after the Doctor notices strange creaking coming from within the house's walls, Bill’s friends start to get picked off one by one. However, it looks like the house is eating people, so it may not have anything to do with the Weeping Angels after all. While they are using the same building (Fields House in Newport, South Wales) for filming, it's possible this episode will focus on another monster entirely.

Something is lurking in the strange tower at the heart of the building, which no one can seem to enter. In what's sure to be the scariest Doctor Who episode of the season, we still have a week to wait and find out what's hiding inside. Plus, there are still a number of mysteries left to figure out from this week's episode like what's in the vault and what or who was knocking. Let's hope that the episode titled 'Knock, Knock' answers these and more of our questions.

Next: Doctor Who: Thin Ice Review & Discussion

Source: BBC