"No gray hairs or baldness or anything." Tosh is happy to play along with the joke, she knows how weird the idea of time travel can feel when you're first starting out. And he isn't the only person she knows who deflects nervousness with humor.

She shakes her head, turning them toward the street and away from the cameras she knows are monitoring the surface above the Hub. "There's no such thing. The only way anyone ever learns anything new is to ask questions, and we all start out not knowing anything. And you might have figured out that I sort of like explaining things."