Matt's ability to hear other people's thoughts has got him in as much trouble as it has helped him.
At the end of the first series his fate is uncertain after the explosion in New York.
Greg is best known for his role in hit US show Alias. He played loveable character Eric Weiss for four seasons before joining the cast of Heroes. In addition to his TV work he has appeared in a number of movies including Mission: Impossible 3 and Austin Powers: Goldmember. In his spare time he runs the charity Hollywood Helping Hands.
Marriages, divorces, affairs and murders - get the lowdown on all your favourite Heroes 2 characters.
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