Drogenean sees these four creatures, which have been so disfigured and pinned and hooked and sewn and pained that they don't really resemble people. And he's just like, these are alien to human experience at this point is what he surmises. He thinks there's supposed to be five of them. They tell him that the engineer will show up when he deems it is necessary. It's not clear exactly the rules of what's happening.