4.8 million viewers watched the series nine finale, Doctor Who: Hell Bent, according to unofficial overnight viewing figures.
The episode had a 21.5% share of the total Television audience.
Doctor Who's figure was slightly inflated by the late running of Strictly Come Dancing which was top for the day with 10.5 million watching. ITV managed 7.7 million for I'm a Celebrity... Get Me Out of Here! which was ahead of The X Factor which had 6.8.million viewers.
On the overnight figures, Doctor Who was 5th for the day, behind Pointless Celebrities which had 5.5 million.
Final figures will be released next week based on the exact running time of the episode and the number watching within one week.