It's very much like the storyline of the Impossible Planet/Satan Pit episodes. A craft/planet is falling into something that would destroy it at the will of a mysterious creature. In IP/SP, it's a Satan-like creature, in 42 it's a star. I get the feeling that Chris Chibnall just ripped off the previously mentioned two-part story, but just compressed it into a single episode. Don't both stories take place in the 42nd century/millennium?