In a South Yorkshire city, Ryan Sinclair, Yasmin Khan and Graham O'Brien are about to have their lives changed forever, as a mysterious woman, unable to remember her own name, falls from the night sky. Can they believe a word she says? And can she help solve the strange events taking place across the city?
Jodie Whittaker
as The Doctor
Bradley Walsh
as Graham O'Brien
Mandip Gill
as Yasmin Khan
Tosin Cole
as Ryan Sinclair
Sharon D. Clarke
as Grace O'Brien
Samuel Oatley
as Tim Shaw
Jonny Dixon
as Karl
Amit Shah
as Rahul
Asha Kingsley
as Sonia
Janine Mellor
as Janey
Asif Khan
as Ramesh Sunder
James Thackeray
as Andy
