Congratulations to actor Adrian Pasdar on winning the 2009 Saturn Award for "Best Supporting Actor on a TV Series" for his work playing Nathan and Sylar on Heroes!
Also, check out the exclusive interview with Chris Hanada and Tanner Kling, directors of the Nowhere Man webisode series!

From Heroes Wiki

The following characters have unknown portraying actors / actresses.

For possible actor/actress names, please see the Clear Credits discussion.