Doctor Who: The Zygon Invasion had an official consolidated rating of 5.76 million viewers.
The rating issued by the Broadcasters' Audience Research Board, or BARB, includes all those who watched the programme within one week of transmission. It does not include those watching online via iPlayer
Doctor Who was the 11th most watched programme on BBC Television, and third overall on Saturday. The episode finished at 24th in the chart.
Top of the week was Strictly Come Dancing with 10.85 million watching.