Doctor Who The Vanquishers was watched by 3.58 million viewers according to unofficial overnight figures. This is a slight drop from episode 5's 3.82 million
It was the day's fifth most-watched programme of the day.
The seven-day consolidated figure, which includes all those who watch the episode within one week. for Episode Five: Survivors of the Flux was 4.72 million.
Doctor Who was the 9th most-watched programme on BBC Television for the week and the 25th most-watched on all British television for the week.