Greg Grunberg is an American actor. His career started in the 1990s, first appearing in some films. His first credited roles were in the movies BASEketball and Senseless. From 1998 to 2002, he became known for his role as Sean Blumberg in Felicity. At the same time, he also played Eric Weiss in Alias. He next appeared in the film Mission: Impossible III. He became further known on television as he played Matt Parkman in Heroes. In the 2010s, he had roles in the films Kill Speed and Group Sex. From 2012 to 2013, he played Dale in the TV series The Client List. Following this, he starred as Gene Moretti in Masters of Sex. He went on to reprise his role as Matt in Heroes Reborn. He recently played Tom Patterson in The Flash.