As reported by Doctor Who Magazine, episode 3 of Doctor Who: Flux, Once, Upon Time, had a consolidated rating of 4.7m viewers. (This includes viewers who watched on the night, or within the next seven days.) On the weekly TV chart, Doctor Who was number 20, and it had the fifth highest rating for Sunday evening.

Episode 3 of Doctor Who: Flux, Once, Upon Time, had a consolidated rating of 4.7m viewers. (This includes viewers who watched on the night, or within the next seven days.) On the weekly TV chart, Doctor Who was number 20, and it had the fifth highest rating for Sunday evening.

— Doctor Who Magazine (@DWMtweets) November 22, 2021