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Knock Knock

Series 10 - Episode 4 Knock Knock



Knock Knock marks the Doctor Who debut of Mike Bartlett, the award-winning playwright who brought Doctor Foster to BBC1 in 2015 – and he’s delivered one of the eeriest episodes in a long while.

Bill and five student buddies are looking for digs. After a series of amusingly hopeless viewings, they’re shown round a rambling old pile with an irresistibly low rent. What’s the catch? The landlord (a pallid David Suchet creeping about with a tuning fork) certainly isn’t letting on.

Freak draughts, 1930s sockets and no mobile signal are the least of their problems. Creaking woodwork and floorboards and a fright that lurks in the “unsafe” tower are what they ought to be scared of. As night closes in and Bill’s friends vanish one by one, can her cool/embarrassing “grandfather” come to her aid?

I adore an Old Dark House chiller and this is up there with the finest. It doesn’t offer much in the way of black humour, but there are plenty of flesh-crawling thrills. Prepare to develop xylophobia – an irrational fear of wood.


Bill and some of her friends decide to move in together, and find what seems to be the perfect house. However, the absurdly cheap rent, and a decidedly creepy landlord (played by guest star David Suchet) suggest that domestic bliss might not yet be on the cards. The Doctor believes something is seriously wrong with his assistant's new home, plagued as it is with strange drafts and oddly creaky floorboards, and that's without considering the ominous tower found at the very heart of the building - one that doesn't seem to have an entrance. Peter Capaldi and Pearl Mackie star, with Matt Lucas.

Cast & Crew

The Doctor Peter Capaldi
Bill Potts Pearl Mackie
Nardole Matt Lucas
Landlord David Suchet
Eliza Mariah Gale
Shireen Mandeep Dhillon
Harry Colin Ryan
Paul Ben Presley
Felicity Alice Hewkin
Pavel Bart Suavek
Estate agent Sam Benjamin
Director Bill Anderson
Executive Producer Steven Moffat
Executive Producer Brian Minchin
Producer Nikki Wilson
Writer Mike Bartlett
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