Creepy Children: The army of small identical children, dark-haired girls and blond boys. They have no language and just keep staring blankly at people. They were created to work as drones in a secret government project with genetically changed corn and bees. To creep and psyche Agent Mulder out even more, the girl drones look exactly like his little sister Samantha who was abducted as a child. The situation implies that her DNA was used in said project.
Genre Savvy: After arriving at Mulder's apartment, X realizes that something is wrong while still in the hallway. He proceeds to leave, but that doesn't save him.