Official figures released by the Broadcasters’ Audience Research Board or BARB, give Doctor Who - Extremis an official rating of 5.53 million viewers.
The rating includes all those who recorded the programme and watched it within 7 days.
Doctor Who is the 20th most watched programme for the week, and 8th most watched on BBC One
Top for the week was Britain's Got Talent on ITV with 11.22 million watching. The three part BBC Drama, based on the true stories of victims of grooming and sexual abuse in Rochdale, Three Girls, took the next three places with around 8 million watching each episode
Full list of Doctor Who Ratings