Final figures for Episode Nine, Cold Blood, published by BARB show the story was watched by 7.49 million viewers.
On BBC One the programme got 7.04 million watching where it was the fourth most watched programme for the channel for the week, beating Tuesday's EastEnders. An additional 0.45 million watched on BBC HD and when added together the programme totalled 7.49 million viewers and was the 9th most watched programme of the week.
The BBC Three Sunday repeat did not rank high enough to get into the top 30 for the week.
Full ratings for the series so far can be found in Gallifrey Base.