The Doctor: Jodie Whittaker
Companions
Bradley Walsh (Graham O'Brien)
Tosin Cole (Ryan Sinclair)
Mandip Gill (Yasmin Khan)
Others
Sharon D. Clarke – Grace
Samuel Oatley – Tim Shaw
Johnny Dixon – Karl
Amit Shah – Rahul
Asha Kingsley – Sonia
Janine Mellor – Janey
Asif Khan – Ramesh Sunder
James Thackeray – Andy
Philip Abiodun – Dean
Stephen MacKenna – Dennis
Everal A Walsh – Gabriel
Ryan, a dyspraxic youth, calls the police after causing a blue pod to appear while retrieving his practice bike. He meets his old school friend PC Yasmin Khan before being called by his grandmother Grace, learning that she, her husband Graham, and crane operator Karl are trapped onboard their train with a floating orb of electric tentacles. Ryan and Yasmin reach the train just as the Doctor falls through the carriage ceiling, the orb departing after zapping the group with an energy bolt. Karl leaves while the others remain with the Doctor, suffering partial post-regeneration amnesia while discovering they have all been implanted with DNA destroying bombs.
The search for the orb brings the group to a warehouse whose owner acquired the pod, linking it to his sister's disappearance, arriving just after the man was killed by an alien that emerged from the pod. The Doctor, assuming the two aliens are mortal enemies, tinkers with the pod and builds a replacement sonic screwdriver from spare parts before the group finds and subdues the orb. The orb is revealed as a mass of biological data-gathering coils with data on Karl as the second alien appears, introducing himself as Tzim-Sha of the warlike Stenza who came to Earth for a ritualistic hunt for leadership. Though a furious Doctor demands Tzim-Sha and his people leave Earth alone, he downloads the coils' data before teleporting to Karl's location.
The group reach the construction yard Karl works at, with the Doctor unsuccessfully attempting to reach him before Tzim-Sha. When Tzim-Sha captures Karl, the Doctor fully recalls her identity while ordering Tzim-Sha to release the human by threatening to destroy his recall device to strand the Stenza on Earth. Tzim-Sha responds by detonating the DNA bombs, but the Doctor reveals she transferred them back into the coils which the Stenza unknowingly self-implanted while downloading the data. As the Doctor throws the recall device at Tzim-Sha to return to his planet, Grace dies as the result of falling from the crane while successfully destroying the coils.
Following Grace's funeral and a change of clothing, the Doctor builds a teleporter to reach the TARDIS. She bids the others farewell, only to inadvertently bring them with her into deep space.
The Woman Who Fell to Earth