The Doctor's face split into a grin at the slight of the other man stepping out of the building.

"Nathan Petrelli?" he asked with a grin, "I'm the Doctor, we spoke?"

He glanced down at his watch, "Don't mean to rush, but there's not a lot of time. Come on, this way----"

He immediately started bounding down the sidewalk, in the direction of a rather mysterious blue police box that sat nestled in the alleyway.