Doctor Who - Empress Of Mars had an estimated audience of 3.58 million viewers, a share of 20.6% of the total TV audience, according to unofficial overnight viewing figures.
Viewing figures were down across the day with no programme getting more than 5 million throughout the day.
Top for the day was Football: World Cup on ITV with 4.73 million watching. The Voice, Kids, had an audience of 4.23 million.
On BBC One, with the ramifications of the UK Election still shaking the country, BBC News at 10pm actually topped the chart with 4.32 million watching. Casualty had an audience of 3.9 million, whicle the comedy Mrs Brown's Boys had 3.58 million watching, Making Doctor Who 6th for the day.
The film Indiana Jones and the Temple of Doom had 2.06 million viewers
Final figures should be available next week.