
While on a hunt in the middle of a junk planet, the Doctor (Jodie Whittaker), Yaz (Mandip Gill), Graham (Bradley Walsh), and Ryan (Tosin Cole) are injured and stranded on a ship where they must work together with strangers to escape an unusual and extremely dangerous alien.
Other than the opening, the episode is pretty much a bottle episode, at least in regards to sets, and there are only six guest cast members (the effects are still spot on, and the alien is as spectacular as it is surprising). However, this made no difference, as the whole episode taking place on the ship gave a more claustrophobic and thrilling feel as the team is running out of time to escape from danger.