At the end of the season when Peter was about to explode. Hiro comes and stabs Sylar. Peter calls out to Hiro and Hiro replies "Peter Peterlli". How did Hiro know Peter. Peter knows what Hiro looks like because he met the Future Hiro on the Train early in the when he got the "Save the Cheerleader. Save the World" message, but Hiro never met Peter to see what he looked like. They never met in the future episode either or did they?
Peter had more time with Ando, and Hiro had more time with Nathan Peterelli. Can someone explain how Hiro would know what Peter looked like or if they met?


