Greg Grunberg returns to network television in NBC's ensemble drama series Heroes as Matt Parkman, a down-on-his-luck LAPD beat cop who is starting to hear the thoughts of others, which puts him on the trail of an elusive serial killer. Heroes follows the lives of ordinary people who discover they possess extraordinary abilities.

Grunberg is best known as the lovable Eric Weiss on Alias, where he spent four seasons thwarting the menacing plans of the world's most dubious villains. Audiences first fell in love with Grunberg when he starred as Sean in four seasons on Felicity. He has appeared in multiple episode arcs on NYPD Blue and Melrose Place and has guest-starred on hit shows, such as Diagnosis Murder, Murphy Brown, Vengeance Unlimited, Oh Baby, Rescue 77, Jersey, Players, Alright Already, Ned and Stacey and Relativity.

In addition to his small screen success, Grunberg has emerged as a thriving film actor. His feature film credits include Mission: Impossible 3, directed by J.J. Abrams and starring Tom Cruise, Malibu's Most Wanted, Ladykillers, Hollow Man, Austin Powers: Goldmember, The Muse, BASEketball, Trigger Effect and Dinner & Driving.

Before his rise to fame, he worked for noted film producers Dino de Laurentiis and Joel Silver and co-wrote and voiced the lead character in a computer-animated pilot for HBO. Recently, he has also helped develop and starred in a few pilots, including The Catch with creator/executive producer J.J. Abrams and Grand Union for NBC.

A philanthropist by nature, Grunberg runs a charitable organization called Hollywood Helping Hands, which auctions off pieces of artwork that are finger-painted by celebrities to benefit the Pediatric Epilepsy Project at UCLA, since his eldest son suffers from pediatric epilepsy. He currently lives outside Los Angeles with his wife, Elizabeth, and their three young sons. His birthday is July 11.