Written by Pete McTighe and Chris Chibnall
"There's a connection between all these things, I just can't see it yet..."
| Episode Title | Premiere Date |
| Praxeus | 02/02/2020 |
What connects a missing astronaut, 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.
| Character | Cast |
| The Doctor | Jodie Whittaker |
| Graham O'Brien | Bradley Walsh |
| Ryan Sinclair | Tosin Cole |
| Yasmin Khan | Mandip Gill |
| Jake Willis | Warren Brown |
| Adam Lang | Matthew McNulty |
| Gabriela Camara | Joana Borja |
| Suki Cheng | Molly Harris |
| Jamila Velez | Gabriela Toloi |
| Joyce | Soo Drouet |
| Zach Olson | Tristan de Beer |
| Aramu | Thapelo Maropefel |
| Role | Crew |
| Writer | Pete McTighe |
| Writer | Chris Chibnall |
| Director | Jamie Magnus Stone |
| Series Producer | Nikki Wilson |
| Executive Producer | Matt Strevens |
| Executive Producer | Chris Chibnall |
