5.08 million viewers watched Doctor Who: Mummy On The Orient Express, according to unofficial overnight figures.
Doctor Who, which had a share of 22.1% of the audience, was the third most watched programme of the day. Top of the chart was Strictly Come Dancing which had 8.65 million viewers. Over on ITV The X Factor was top with 7.55 million watching.
The episode of Doctor Who was broadcast at 8.37pm making it the latest showing for the series in its entire history.
Doctor Who is currently 19th for the week. Final figures should be available next Sunday.