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Greg Grunberg

Greg Grunberg

Gregory Phillip \"Greg\" Grunberg is an American television and film actor. He is best known for starring as Matt Parkman on the NBC television series Heroes. Other notable roles include the characters Sean Blumberg on Felicity, the pilot Seth Norris on Lost and Eric Weiss on Alias, all three created and produced by childhood friend J. J. Abrams, and as exterminator Alex Mathis in Big Ass Spider! He is a recurring cast member in the first 2 seasons of the Showtime American television drama series Masters of Sex.