5.77 million viewers watched the christmas special, Doctor Who: The Husbands of River Song, according to unofficial overnight viewing figures.
The episode had a 29.4% share of the total Television audience.
The most watched programme on Christmas Day was the final instalment of Downton Abbey, with 6.9 million watching, giving ITV the top spot.
The BBC's highest offering was the Christmas edition of Strictly Come Dancing, which had 6.5 million viewers. Mrs Brown's Boys and Stick Man also did well as did Coronation Street and Call the Midwife, making Doctor Who the 7th most watched programme of the day, just above EastEnders.
Official figures will be released in 9 days time.