Greg Grunberg. Actor: Hollow Man - Unsichtbare Gefahr. Gregory Phillip "Greg" Grunberg is an American television and film actor. He is best known for starring as Matt Parkman in the NBC television series Heroes and "Snap" Wexley in Star Wars: The Force Awakens. He has often appeared in works produced and directed by childhood friend J. J. Abrams. He is a recurring cast member in the first two seasons of...