Holt is clearly a robot. No emotions. Monotone voice Rosa is also possibly a robot. Probably a sexbot Amy with her organizing everything also most likely a robot Jake made a baby with her, so another robot as robots and humans can't procreate Charles has another person that looks and acts exactly like him. Robot most likely but possible clone Hitchcock/Scully were once human but now at best now some sort of cyborg Terry has inhuman strength. Obvious robot