Doctor Who (2005– )
17 user 21 critic

Knock Knock 

Bill is moving in with some friends and they've found the perfect house rented by the landlord. The wind blows, the floorboards creak and the Doctor thinks something is very wrong.


Bill Anderson


Mike Bartlett




Episode cast overview:
Peter Capaldi ... The Doctor
Pearl Mackie ... Bill
Matt Lucas ... Nardole
David Suchet ... Landlord
Mariah Gale ... Eliza
Mandeep Dhillon ... Shireen
Colin Ryan ... Harry
Ben Presley ... Paul
Alice Hewkin ... Felicity
Bart Suavek ... Pavel
Sam Benjamin ... Estate Agent
Tate Pitchie-Cooper ... Young Landlord


As Bill and some friends are searching for a house to rent and not pleased by the houses they've visited; a mysterious landlord appears with this very cheap and enormous house which they take the offer and move to the new house. But all its not as it seems as the wood creaks, the house traps them, Bill and The Doctor are separated from each other and some bizarre and macabre force is taking the life of each one of the people of the house. Is this cause of the mysterious landlord? Has this happened before? Can Bill and her friends survive the evilness of the house? Written by Jose Benavides

Plot Summary | Add Synopsis


TV-PG | See all certifications »

Parents Guide:

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Release Date:

6 May 2017 (USA) See more »

Company Credits

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Technical Specs


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Did You Know?


Harry (Colin Ryan) was originally intended to be the grandson of Doctor Who (1963) companion Harry Sullivan (Ian Marter), but this was cut out because the writers thought that people "might not remember one companion from 40-odd years ago." See more »


When the Doctor is telling the group that everything in the house is old fashioned, Paul is standing with his hands tucked well into his pockets & his thumbs outside but when the camera angle changes, as the Doctor is talking about Chinese food, Paul's hands are now outside his pockets with his thumbs hooked inside them. See more »


[Für Elise is heard coming from the vault]
Nardole: A piano? You've put a piano in there? Why?
The Doctor: [dismissing him] Good night.
Nardole: Oh, you don't learn, do you, sir?
See more »


References Raiders of the Lost Ark (1981) See more »


Pop Goes the Weasel
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User Reviews

Mediocre episode. Good to see David Suchet.
6 May 2017 | by kcmurphy88See all my reviews

The only good thing about this episode is that David Suchet is in it. Bill and friends go into creepy house with creepy landlord, bad things happen as expected, Doctor does stuff and it's all good. It is no more complicated than that.

Meh. SIX is being generous because I like David Suchet.

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