The episode stars Jodie Whittaker as the Thirteenth Doctor, alongside Mandip Gill and John Bishop as her companions, Yasmin Khan and Dan Lewis, respectively.
Remaining in Sevastopol, the Doctor realizes Britain's opponents in the war are now the Sontarans, with all traces of China and Russia replaced with Sontar.
Yaz materializes in the Temple of Atropos on the planet Time, where she briefly encounters Joseph Williamson before befriending Vinder.
The pair destroy the primary fleet by ramming their captured vessel into the shipyard and evacuating at the last moment, resetting the timeline.
Poisoning the supply system of the Sontarans in Crimea, the Doctor cripples their offensive, forcing them to retreat, but the British General Logan bombs their vessels as revenge for massacring his troops.
Knowing the power unleashed will kill Yaz, the Doctor begs Swarm not to activate the temple, but he ignores her and takes control.
[20] Michael Hogan of the Telegraph wrote that the episode was "zipping along with verve and energy" and praised how John Bishop's portrayal of Dan combined both wit and emotional vulnerability.