The Bells of Saint John had an overnight audience of 6.18 million viewers, a share of 29.8% of the total TV audience.
Doctor Who was the third most-watched programme of the day, which saw old rivals Ant and Dec take the top slot with their Saturday Night Takeaway, getting 7.19 million watching. The Voice UK, which was up against Ant and Dec, came second with fractionally more viewers than Doctor Who with 6.24 million.
Doctor Who won the time slot with You've Been Framed! on ITV getting 3.6 million watching.
Overall Doctor Who currently stands at the 22nd most watched programme of the week. Final ratings will be released next week, which, if recent trends are followed, should see Doctor Who substantially increase its rating once those who timeshift the programme are factored in.