The Rings of Akhaten had an overnight audience of 5.5 million viewers, a share of 28.8% of the total TV audience.
Doctor Who was once more third for the day, although the gap between the series and the programmes at the top of the chart was slightly larger, perhaps reflecting the lighter evenings.
Top of the list was Ant & Dec's Saturday Night Takeaway with 7.3 million watching, while The Voice was second with 6.4 million viewers.
Doctor Who once more won the time-slot with You've Been Framed Rides Again! getting 3.4 million watching.
Final ratings will be released next week, which should see Doctor Who substantially increase its rating once those who timeshift the programme are factored in.