If you're an American Fan of the NBC TV series "HEROES" - you can watch past episodes over at the NBC TV site. Here's where you can access Heroes - Episode 16 - "Unexpected":
(links open in new window)

Heroes - Episode 16 - "Unexpected" (NBC site)

If you cannot access the American viewing site, don't worry - TV Links out of the UK has links for the episodes. It outlinks to "Ouou" which has been a very reliable site.

Heroes - Episode 16 - "Unexpected" (TV Links+Ouou)

This is a great episode!