Parts: 1 (45-minute)
Writer: Chris Chibnall
Airdate: 04 November 2018
Production Code: n/a

Doctors: thirteenth
Companions: Ryan, Yaz, Graham

Story: While scavenging for spare parts on the scrapyard planet of Seffilun 27, the Doctor is startled when Graham uncovers a primed sonic mine. Before they can react, the mine goes off, badly injuring all of them.

Fortunately, they're swiftly rescued by a passing medical-triage craft, en route to its hub where the patients can receive proper medical attention. But the TARDIS crew have barely regained consciousness when the ship is intercepted and boarded by a ravenous space creature. Not only does it quickly threaten the safety of everyone on board, but if the medical hub gets wind that the craft has been infiltrated by an unknown contaminant, they will not hesitate to blow up the entire ship...