"He's a time traveler. So is the one named Harold Saxon--the Doctor called him 'The Master.' I've gathered they're of the same species--and the Doctor claims the Master is dangerous, possibly genocidal. That would make the 'Master' moniker understandable, it certainly sounds like the name of a supervillain," Brainiac 5 says. "Of course, there's no reason the Doctor should be trusted either. They're both immensely...unusual individuals."