Doctor Who: The Ghost Monument was watched by 7.11 million viewers, a share of 33.4% of the total TV audience, according to unofficial overnight figures.
The figures, although down on the season premiere, is enough to make Doctor Who the third most watched programme of the week, behind two editions of Strictly Come Dancing. Strictly took top spot for Sunday with 9.2 million watching. The main Saturday edition got 10.6 million viewers as was the most watched programme of the week.
Just before Doctor Who, Countryfile had 4.94m watching, while later the drama The Cry managed 4.59m viewers.
It was a good night for Bradley Walsh who had 4.8 million watching The Chase: Celebrity Special on ITV, directly opposite his Doctor Who appearance. ITV's highest rated programme was The X-Factor with 5.1 million viewers.
Official figures, which will be released next Monday, will include those to recorded the episode and watched it later. They are expected to be considerably higher than the initial figures.