Doctor Who spoilers! Watch a first look at tonight's new episode Knock Knock

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Here's a spoiler-filled preview of tonight's new episode of Doctor Who on BBC One.

Over 3 million viewers tuned in to last week's latest episode and tonight the tenth series continues with new episode Knock Knock, written by Mike Bartlett and directed by Bill Anderson.

The Doctor (Peter Capaldi) will be joined once again by new companion Bill (Pearl Macki) and Nardole (Matt Lucas) while David Suchet guest stars at the Landlord.

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?

Meanwhile, the BBC has revealed that 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.

Doctor Who airs tonight at 7:20PM on BBC One.

This year's run is Peter Capaldi's last as the Doctor, previously announcing he would be stepping down after this year's Christmas special.

Capaldi first stepped into the TARDIS in 2013, and will leave the iconic role in the 2017 Christmas special after three incredible series of the BBC's global hit sci-fi drama.

Peter Capaldi said ahead of the current run: "One of the greatest privileges of being Doctor Who is to see the world at its best.

"From our brilliant crew and creative team working for the best broadcaster on the planet, to the viewers and fans whose endless creativity, generosity and inclusiveness points to a brighter future ahead. I can’t thank everyone enough. It’s been cosmic."

Peter Capaldi's final series also marks writer and executive producer Steven Moffat's last.

He said: "Like Peter, I’m facing up to leaving the best job I’ll ever have, but knowing I do so in the company of the best, and kindest and cleverest of men, makes the saddest of endings a little sweeter. But hey, it’s a long way from over.

"Peters’ amazing, fiery, turbulent Doctor is still fighting the good fight, and his greatest adventures are yet to come. Monsters of the universe, be on your guard - Capaldi’s not done with you yet!”

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