Doctor Who: The Zygon Inversion had an official consolidated rating of 6.03 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 9th most watched programme on BBC Television, and third overall on Saturday. The episode finished at 24th in the chart.
The final episode of the ITV drama Downton Abbey topped the ratings for the week with 10.90 million viewers.