Series 13 Ratings
The final episode of Series 13: Doctor Who Flux, The Vanquishers, had a seven-day rating of 4.61 million viewers.
The rating made Doctor Who the 6th most-watched programme on BBC Television for the week and the 26th most-watched on all British television. The chart was dominated by ITV's I'm a Celebrity... Get me out of here with 6 of the top ten places. The most-watched programme of the week was Strictly Come Dancing on BBC One.
The rating gave Doctor Who an average rating of 5.15 million for the year 2021. This is the lowest annual rating since the programme returned in 2005. However, the series scored lower than 5 million in 1986, 1987 and 1989.
In terms of chart position, each episode appeared in the list of top 30 programmes of the week.
With the conclusion of Series 13, Doctor Who has broadcast 868 episodes which, if you watched them back to back, would last 17 days, 20 hours and 40 minutes.
| TITLE | Time | Length | 7 Day Rating | AI | Position |
| Chapter One: The Halloween Apocalypse | 6:26 pm | 49:55 | 5.81m | 76 | 8th |
| Chapter Two: War of The Sontarans | 6:16 pm | 59:24 | 5.13m | 77 | 13th |
| Chapter Three: Once, Upon Time | 6:30 pm | 49:03 | 4.70m | 75 | 19th |
| Chapter Four: Village of the Angels | 6:19 pm | 56:35 | 4.57m | 79 | 18th |
| Chapter Five: Survivors of the Flux | 6:26 pm | 50:34 | 4.83m | 77 | 21st |
| Chapter Six: The Vanquishers | 6:22 pm | 59:16 | 4.64m | 76 | 26th |
some data has been updated by BARB following the initial release
The full list of Doctor Who Ratings since the launch in 1963 can be found on the Doctor Who Guide