Doctor Who returns to BBC One this weekend with an episode from Doctor Foster writer Mike Bartlett.

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?

Pre-order the new season on DVD on Amazon here.

Pre-order the new season on Blu-ray on Amazon here.

‘Knock Knock’ airs at 7.20pm on Saturday 6 May on BBC One.

Here are 10 spoiler-free lines of dialogue from the episode…

 

1. ‘Pop up. Freestyle. Boom.’

2. ‘I’d quite like underfloor heating.’

3. ‘You’re talking like you’ve seen things like this before.’

4. ‘I’m coming in.’

5. ‘No, never tell me that.’

6. ‘Wicked.’

7. ‘You’re not leaving are you?’

8. ‘There wasn’t any wind.’

9. ‘It’s alright. I’ll go.’

10. ‘I take it back. You’re fine. He’s weird.’

 

Who do you think says each line? And what are they talking about? Let us know below…