Oxygen: Main Broadcast Details
United Kingdom	BBC One	Sat 13 May 2017	7:15pm BST
Middle East	BBC First	Sat 13 May 2017	9:20pm AST	(Sat 7:20pm BST)
United States of America	BBC America	Sat 13 May 2017	9:00pm EDT	(Sun 2:00am BST)
Canada	SPACE	Sat 13 May 2017	9:00pm EDT	(Sun 2:00am BST)
New Zealand	PRIME	Sun 14 May 2017	7:30pm NZST	(Sun 7:30am BST)
Finland	YLE2	Sun 14 May 2017	11:30am EEST	(Sun 9:30am BST)
Australia	ABC	Sun 14 May 2017	7:40pm AEST	(Sun 10:40am BST, also on ABC ME)
Brazil	SyFy	Sun 14 May 2017	8:00pm BRT	(Sun 11:00pm BST)
Latin America	SyFy	Sun 14 May 2017	10:00pm CDT	(Mon 4:00am BST)

Full listings here

Official figures released by the Broadcasters’ Audience Research Board or BARB, give Doctor Who - Thin Ice an official rating of 5.51 million viewers.

The rating includes all those who recorded the programme and watched it within 7 days.

Doctor Who is the 25th most watched programme for the week, and 10th most watched on BBC One

Top for the week was ITV's Britain's Got Talent with 10.60 million watching. Drama's doing well include BBC One's Line of Duty with 9.92 million and ITV's Little Boy Blue with 7.17 million. Doctor Who sliped behind the soaps EastEnders and Emmerdale as well as Coronation Street.

Doctor Who was the second highest BBC One programme for Saturday night, just behind of the entertainment show All Round to Mrs Brown's

Doctor Who - Knock Knock had an Audience Appreciation or Ai figure of 83

The Appreciation Index in an indication of how much viewers enjoyed the episode. It is based to the reactions of a selected panel of viewers, who rate the episode shortly after transmission.

83 is considered a good score, roughly similar to the scores achieved by the last series of the show,

The highest score for the evening on the two main channels was achieved by Casualty on BBC One which scored 85.

Knock Knock has debuted in Australia, averaging 417,000 viewers in the five major capital cities. The story was the second highest rating ABC drama of the day and the twelfth highest rating program of the day overall. These ratings do not include iview, regional or time-shifted viewers. The binaural edition of Knock Knock, with enhanced sound, is also now available on ABC iview.

Meanwhile, including time-shifted viewers, Smile averaged 574,000 consolidated viewers in the five major capital cities. With 110,000 extra viewers it was the highest time-shifted program of the day (the second highest time-shifted program had 104,000 extra viewers) and the eighth highest rating program of the day overall. These ratings do not include iview or regional viewers.

Doctor Who - Knock Knock had an overnight viewing audience of 4.32 million viewers, a share of 24.9% of the total TV audience, according to unofficial figures. Doctor Who increased its audience by half a million from the previous week.

Top for the day was once more the ITV variety show Britain's Got Talent with 9.35 million viewers. Doctor Who was top for BBC One for the evening, with Pointless Celebrities getting 4.20 million watching, while Casualty managed 4.02 million.

Knock Knock: Known Broadcast Details
United Kingdom	BBC One	Sat 6 May 2017	7:20pm BST
Middle East	BBC First	Sat 6 May 2017	9:20pm AST	(Sat 7:20pm BST)
United States of America	BBC America	Sat 6 May 2017	9:00pm EDT	(Sun 2:00am BST)
Canada	SPACE	Sat 6 May 2017	9:00pm EDT	(Sun 2:00am BST)
Finland	YLE2	Sun 7 May 2017	11:00am EEST	(Sun 9:00am BST)
Australia	ABC	Sun 7 May 2017	7:40pm AEST	(Sun 10:40am BST, also on ABC ME)
Brazil	SyFy	Sun 7 May 2017	8:00pm BRT	(Sun 11:00pm BST)
Latin America	SyFy	Sun 7 May 2017	11:00pm CDT	(Mon 4:00am BST)
New Zealand	PRIME	Sun 7 May 2017	7:30pm NZST	(Mon 8:30am BST)

A special 3D sound mix of this week’s episode makes it feel as if you’re part of the action, according to a group of Welsh students.

Speaking at an exclusive screening of the binaural audio edition of episode four, Knock Knock, the students called it a great experience, saying the enhanced version sounds as if at any minute the monsters could be coming after you.

The enhanced binaural audio episode will be available on BBC iPlayer immediately after the adventure premieres on BBC One and BBC One HD from 8.10pm on Saturday, 6 May. Viewers can find it by searching Doctor Who Enhanced on BBC iPlayer or visiting: www.bbc.co.uk/doctorwhoenhanced

The binaural edition creates a 3D surround soundscape for anyone wearing headphones, placing the audience at the heart of the action while the bumps, scrapes, shrieks and screams echo around them as if they were actually there. To create the enhanced version, the team used new software developed by BBC Research & Development to artificially mimic the subtle effect the shape of the viewer’s head and ears have on what they hear. This lets sound engineers give the impression of specific sounds like the creaks and groans of the old house in Knock Knock being in front, behind, or all around viewers.

Brian Minchin, executive producer, Doctor Who, said: Catherine Robinson, audio supervisor at BBC Wales, said:

BBC Worldwide have released details on the forthcoming DVD/Blu-ray sets for the current series of Doctor Who:

The BBC has confirmed that this week's episode of Doctor Who, Knock Knock, will be available on the BBC iPlayer in special binaural edition, available immediately after the episode has broadcast on BBC One.

Binaural is a method of sound reproduction that is intended to replicate the way the human brain understands sound to give the listener as natural an experience as possible. Rather than using a series of speakers to reproduce a soundscape, the Binaural process records sound using two microphones separated by the width of a human head. When listening to the replay through headphones, the effect is to replicate the sound going into each ear giving the listener the effect of actually being in the room where the sound was recorded.

The binaural edition of Knock Knock will be available on BBC iPlayer from 8.10pm on Saturday, 6 May.

The binaural process can be heard on the preview clip on the official BBC Doctor Who page. To experience it you need to listen to the clip on headphones.

Official figures released by the Broadcasters’ Audience Research Board or BARB, gives Doctor Who - Smile an official rating of 5.98 million viewers.

The rating includes all those who recorded the programme and watched it within 7 days.

Doctor Who is the 23rd most watched programme for the week, and 8th most watched on BBC One

Top for the week was incoming showrunner Chris Chibnall's Broadchurch, starring David Tennant, which beat ITV's Britain's Got Talent, to take the top place with 11.61 million watching. Unlike last week , Doctor Who sliped behind the soaps EastEnders and Emmerdale as well as Coronation Street.

Doctor Who remained the top BBC One programme for Saturday night, just ahead of the entertainment show All Round to Mrs Brown's

The BBC have released a number of new publicity images to promote this week's episode of Doctor Who, Knock Knock
BBC One continues to show Doctor Who at 7;20pm, with BBC First simulcasting the episode across the Middle-East

Thin Ice: Known Broadcast Details
United Kingdom	BBC One	Sat 6 May 2017	7:20pm BST
Middle East	BBC First	Sat 6 May 2017	9:20pm AST	(Sat 7:20pm BST)
United States of America	BBC America	Sat 6 May 2017	9:00pm EDT	(Sun 2:00am BST)
Canada	SPACE	Sat 6 May 2017	9:00pm EDT	(Sun 2:00am BST)
Finland	YLE2	Sun 7 May 2017	11:00am EEST	(Sun 9:00am BST)
Australia	ABC	Sun 7 May 2017	7:40pm AEST	(Sun 10:40am BST, also on ABC ME)
Brazil	SyFy	Sun 7 May 2017	8:00pm BRT	(Sun 11:00pm BST)
Latin America	SyFy	Sun 7 May 2017	11:00pm CDT	(Mon 4:00am BST)
New Zealand	PRIME	Sun 7 May 2017	7:30pm NZST	(Mon 8:30am BST)