The episode stars Jodie Whittaker as the Thirteenth Doctor, alongside Mandip Gill and John Bishop as her companions, Yasmin Khan and Dan Lewis, respectively.
On the Division spacecraft, Azure attempts to return the Doctor's missing memories to her using the fob watch.
Azure reveals her intent to engineer the Flux into a time loop of universal destruction.
Yaz, Dan, Jericho, and Williamson take out the Sontaran vanguard with lightning from a tunnel door before traveling to 2021 through another.
The Doctor bargains for Claire and Jericho to help them find the final Flux event's coordinates.
The Doctor piloting the TARDIS frees her copy from the Grand Serpent's torture device and aims it at him.
[15] The seven-day consolidated rating (counting all views across all platforms within seven days of broadcast) was 4.64 million.
[16] Martin Belam of The Guardian called The Vanquishers "a decent episode that ended what was the best, most consistent season of the Whittaker era.
"[17] Louise Griffin for the Metro gave the episode three stars out of five, describing it as "a finale that’s enjoyable but [which] feels like it’s frantically trying to tie up loose ends as efficiently as possible.