"I doubt I'll have to," Caretaker replied. "He overlooked a couple of key points, like that I have to be satisfied that the task is complete, or that he has to keep his distance. You know him best, do you really think he'll be able to wait too long? There's also the matter of time between tasks. I can keep him waiting for the next five billion years if I need to, but there's no question he'll be useful for the war."