Overnight Viewing Figures for The Power of Three show the episode achieved 5.49 million viewers with a 25.6% share of the total TV audience.
Doctor Who was the second highest rated for the day on all channels with The X Factor gaining 8.24 million viewers on ITV1. Casualty was third with 4.0 million and against Doctor Who, Red or Black? had 3.66 million watching.
The Power of Three was up on ratings compared to last years fourth episode of the Autumn run, The God Complex, which had an overnight figure of 5.2 million.
These ratings put Doctor Who 17th for the week with Sunday's ratings still to come. The final consolidated figures will be available next week.
Asylum of the Daleks - 6.4 million (overnight) 8.3 million (final figure)
Dinosaurs on a Spaceship - 5.5 million (overnight) 7.57 million (final figure)
A Town Called Mercy - 6.6 million (overnight) TBA (final figure)
The Power of Three - 5.49 million (overnight) TBA (final figures)