Unofficial overnight figures show The Eleventh Hour was watched by 7.7 million viewers on BBC One with another 0.3 million watching on BBC HD, giving a total audience of 8.0 million viewers.
The programme has a share of 36.8% of the total viewing audience.
The programme was by far the most watched on British television on Saturday night, beating second placed Casualty by nearly 2.5 million viewers. The BBC comprehensively ruled the night with the top six programmes and eight out of the top ten. Ant & Dec's Push the Button scored highest for ITV 1 with just 3.9 million watching while Harry Potter had an average of 2.9 million viewers.
With one day to go, Doctor Who is the 8th highest programme of the week in a top ten which, apart from Doctor Who, consists entirely of the soaps EastEnders and Coronation Street.
On BBC Three, Doctor Who Confidential was watched by 0.88 million viewers. The programme had a 4.3% share of the audience and was the second most watched multi-channel programme of the day.
Final figures will be released in about 10 days time.