There’s a lot of … tat in the Grey Archive. That’s why they need so much room. Everything that comes into contact with aliens must be analysed. There are as many boxes here dedicated to Cardiff quarry gravel as there are potentially world-ending threats. That’s why Osgood loves it. She has exactly the same amount of interest in a Silurian tea-set as she does in antimatter drives.

KATE: I mean, if thieves invade the Black Archive, it just detonates a nuke. Simple, yet effective.