"That's surprisingly not that horrifying," Malcolm says, his voice edging on deadpan. While his father insisted that he had never violated the Hippocratic Oath and intentionally hurt one of his patients, Malcolm wasn't so sure he could buy that. How could he turn off that need to kill when it came to his patients but not with innocent victims?

"Anyway, it's... like a carriage that runs itself," he continues, steering the topic back. "It uses petroleum oil to make the engine work. I don't think they have petroleum in your time either. Well, technically they do, they just haven't discovered it and its properties yet."