Parts: 1 (60-minute)
Writer: Chris Chibnall
Airdate: 01 January 2022
Production Code: n/a

Doctors: thirteenth
Companions: Yaz, Dan

Megalomaniacs of the Week: Daleks

Story: In a foul mood because her coworker has, as usual, failed to show for his shift, Sarah finds herself welcoming more clients than usual to her self-storage building on New Year's Eve. First through the door is annual visitor Nick, who Sarah tolerates as her only customer, though she regards his habit of adding to his storage unit every year — and, indeed, Nick himself — as weird. Unbeknownst to Sarah, in the building's basement, the TARDIS has materialized, preparing to reset its interior dimensions following the damage wreaked upon it by the Flux. But shortly, a much less pleasant visitor will appear: a Dalek, determined to hunt down and exterminate everyone in the building.

But the TARDIS' reset has triggered a localized time loop, as the Doctor soon discovers when she's exterminated in reception... only to reappear in the basement, intact and healthy. With a limited number of do-overs available, can the TARDIS crew keep themselves alive, rescue both Sarah and Nick from certain death, and brainstorm a way to use their limited resources to destroy the Daleks?