Nathan Stephenson (born July 27, 1986) is a Canadian actor. He is best known for his starring roles in Radio Free Roscoe as Robbie and in System Crash as James . He has also guest starred on Naturally, Sadie, Dark Oracle and in the TV film Cyber Seduction: His Secret Life. As of 2008 he has a recurring role in Degrassi: The Next Generation. He plays Griffin a HIV positive character who struggles with life & relationships