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In Doctor Who S10 Ep4 titled “Knock Knock” Bill moves in with some friends where the landlord is a little creepy!

Why do floorboards creak? When a sinister landlord shows Bill and her friends the perfect house-share, they have no idea what lies ahead … knock knock, who’s there?

Agatha Christie's Poirot, S9 Ep1 - David Suchet
Agatha Christie’s Poirot, Season 9 Episode 1 “Five Little Pigs” – Poirot (David Suchet) ©2003 ITV

David Suchet, of Agatha Christie’s TV Poirot fame, stars are Bill’s creepy landlord. Check out the official lowdown below and a special note for UK viewers to get a little more involved. (No word yet for US and other viewers)

Doctor Who Season 10 Episode 4 is due to first air on Saturday May 6th 2017.

Doctor Who S10 Ep4 “Knock Knock” Main Stars Gallery

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Doctor Who S10 Ep4 “Knock Knock” Official Lowdown

Bill is moving in with some friends and they’ve found the perfect house – so what if it’s strangely cheap to rent, and the landlord is a little creepy?

The wind blows, the floorboards creak, and the Doctor thinks something is very wrong. What lurks in the strange tower at the heart of the building – and why can’t they find any way to enter it?

The Doctor is played by Peter Capaldi, Bill by Pearl Mackie and Nardole by Matt Lucas. David Suchet guest stars at the Landlord.

“Knock Knock” is written by Mike Bartlett and directed by Bill Anderson.

Note: In the UK a special binaural audio edition of this episode will be available on BBC iPlayer immediately after it is broadcast on TV. This creates a 3D surround sound effect for anyone wearing headphones, placing them at the heart of the action in this nail-biting episode.

Agatha Christie's Poirot, S9 Ep1 - David Suchet
Agatha Christie’s Poirot, Season 9 Episode 1 “Five Little Pigs” – Poster: Poirot (David Suchet) ©2003 ITV