[So Tadashi could, in theory, be somewhere safe and try for rebirth. But if he did, Hiro would never know. Would that be better or worse? That's the complication.] And the guy he tried to save...he didn't do anything to help Tadashi. He just let him die and he tried hurting someone else. [A beat.] What would happen to him?

How did you find somebody who was dead for seventy years? [And better yet, how did he know she was his half-sister?] What happened to all of the other souls that were escaping?