Season Page

Season --

Season 1

Season 2

Season 3

Season 4

Season 4.1 - The End of Time: Part 1

Season 4.2 - The End of Time: Part 2

Season 5

Season 6

Season 6.1 - A Christmas Carol

Season 6.2 - The Doctor, the Widow and the Wardrobe

Season 7

Season 7.1 - Christmas 2012 -- The Snowmen

Season 7.2 - The Night of the Doctor

Season 7.3 - The Day of the Doctor

Season 7.4 - The Time of the Doctor

Season 8

Season 8.1 - Last Christmas

Season 9

Season 9.1 - The Husbands of River Song

Season 9.2 - The Return of Doctor Mysterio

Season 10

Season 10.1 - Twice Upon a Time

Season 11

Season 11.1 - Resolution

Season 12

Season 12.1 - Revolution of the Daleks

Season 13 - Flux

Season 13.1 - Eve of the Daleks

Season 13.2 - Legend of the Sea Devils

Season 13.3 - The Power of the Doctor

Episode --

Doctor Who – Season 10, Episode 4 Knock Knock

Play trailer

0:41

Doctor Who – Season 10, Episode 4

Knock Knock

Aired May 6, 2017

Sci-Fi

Fantasy

Drama

Play Trailer

Watchlist

Watchlist

Tomatometer

Popcornmeter

88%

Tomatometer

17 Reviews

A sinister landlord shows Bill and her friends a "perfect" house to share.

Watch on Fandango

Stream Now

Critics Consensus

A bit of narrative weakness aside, "Knock Knock" is a wonderful mix of nostalgia, horror, humor, and monsters that culminates into a powerful and emotionally complex episode.

Read Critics Reviews

The Adventures of Merlin

85%

87%

The Adventures of Merlin

Watchlist

Battlestar Galactica

95%

94%

Battlestar Galactica

Watchlist

Legend of the Seeker

46%

84%

Legend of the Seeker

Watchlist

Andromeda

%

60%

Andromeda

Watchlist

Smallville

78%

72%

Smallville

Watchlist

Discover more movies and TV shows.

View More

Peter Capaldi

The Doctor

Pearl Mackie

Bill

Matt Lucas

Nardole

Steven Moffat

Executive Producer

Richard Curtis

Writer

Chris Chibnall

Writer

Doctor Who: Season 10 Episode 4 Trailer

0:41

Doctor Who: Season 10 Episode 4 Sneak Peek - What's Going On?

0:48

View more videos

View more photos

Steven Cooper

Slant Magazine

05/08/2017

It's good to have what seemed like a straightforward "monster" story turn into something with more emotional complexity to it.

Go to Full Review

Noam Cohen

Observer

05/08/2017

I think it's about time to call it: This season of Doctor Who is shaping up to be a real yawn.

Go to Full Review

Ross Ruediger

New York Magazine/Vulture

05/08/2017

2/5

Folks, we hit our first truly duff episode of the year. There's at least one every season, but let's hope there aren't too many more ...

Go to Full Review

James Whitbrook

io9.com

05/19/2018

"Knock Knock" is the first time in a very long while something on Who managed to actually scare me in more than just a particularly chilling concept.

Go to Full Review

Zoe Delahunty-Light

SFX Magazine

05/15/2017

4.5/5

Everything is bubbling below the surface, and I can't help but tremble with excitement as the next episode has an almighty amount potential stored up.

Go to Full Review

Jef Rouner

Houston Press

05/09/2017

One, I am loving it. The writing is superb, and Peter Capaldi and Pearl Mackie make the best team since Sylvester McCoy and Sophie Aldred (Or, Paul McGann and India Fisher for my Big Finish Audio fans). I'm thoroughly enjoying that.

Go to Full Review

Read all reviews

Synopsis

A sinister landlord shows Bill and her friends a "perfect" house to share.

Executive Producer: Steven Moffat
Screenwriter: Richard Curtis, Chris Chibnall, Toby Whithouse, Mark Gatiss, Simon Nye, Steven Moffat
Network: BBC
Rating: TV-PG
Genre: Sci-Fi, Fantasy, Drama
Original Language: British English
Release Date: May 6, 2017