Parts: 2 (60-minute)
Writer: Chris Chibnall
Airdate: 01 — 05 January 2020
Production Code: n/a

Doctors: thirteenth
Companions: Ryan, Yaz, Graham

Megalomaniac of the Week: the Master
Creature Feature: Kasaavin

Story: All across the world, spies for various governments are murdered — outdoors in broad daylight, in a safehouse, even in an airplane bathroom over the Pacific Ocean — and not only is the international intelligence community clueless about who's behind the killings, they have no idea how their agents even died.

In desperation, MI6 recruits the Doctor and her companions to help... but on their way to London, their transport is attacked. Something remotely hijacks the GPS, assassinates the driver, and attempts to steer the car off an unfinished overpass. Whomever is assassinating Earth's spies seems determined to keep the Doctor from getting too close...