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Peter travels to the future and adopts a dangerous ability in order to try to save the world. Meanwhile, Mohinder struggles with his continuing evolution from the formula, and Hiro and Ando re-unite with an old enemy.
First Air Date : Sep 25, 2006
Last Air date : Feb 08, 2010
Episode : 78 Episode
Season : 4 Season
Runtime: 43:14 minutes
Studio: NBC
Country: United States of America