What connects a missing astronaut in the Indian Ocean, birds behaving strangely in Peru and a US naval officer who washes up on a Madagascan beach?
The Doctor, Yaz, Ryan and Graham split up to investigate mysterious events across 21st century planet Earth. As the mystery deepens, and lives are put at risk, the TARDIS team face a deadly race against time to save humanity.
Jodie Whittaker as The Doctor
Mandip Gill as Yaz
Tosin Cole as Ryan
Bradley Walsh as Graham
Joana Borja as Gabriela Castillo
Thapelo Maropefela as Aramu
Molly Harris as Suki Cheng
Warren Brown as Jake Willis
Matthew McNulty as Adam Lang
Written by Pete McTighe and Chris Chibnall
Directed by Jamie Stone
Doctor Who continues Sunday 2nd February at 7:10pm on BBC One