Knock Knock sees Bill and some of her student friends find a new place to live thanks to a mysterious landlord played by the incredibly talented David Suchet. Who better to help Bill move in than the Doctor himself, especially when the students start disappearing and a mystery starts to develop.
This episode is a bit of a departure from the first three episodes in that it starts off a lot more spooky. Some people have even pointed out that it might be a bit too scary for some folk but as many people have said, Doctor Who has always had plenty of stories to give audiences a good scare.
Watching the interactions between Bill and her flatmates was a lot of fun to watch as was the moments between Bill and the Doctor. The flatmates were all fairly typical and it was good to see some of them getting involved with the main story. However it was also great to see that they didn’t take to much focus way from the Doctor and Bill.
An old creaking house is the perfect place for a landlord played by David Suchet to hang out and I really liked how he was able to pop in and out of scenes. The scene towards the end between David Suchet and Mariah Gale who played Eliza was one of my favourites and the reason it worked so well was because the episode was done well.
The setting of the story was great and I liked how it was all contained with the house. It certainly added a lot to the spooky atmosphere that the episode was going for. Watching the Doctor interact with the students and Bill with her friends was also great to see. Plus I really just had a nice time watching this one.
Back at the university, the Doctor enters the vault to feed their prisoner as piano music echoes from inside. Like most people I have my theories as to what or who might be behind that door but I guess we will just have to wait a little longer to find out.