1x02 Don't Look Back

Hiro time travels more than a month into the future of New York City; there he finds Isaac dead, and witnesses a nuclear explosion. Politician Nathan Petrelli tries to dismiss his recent self-propelled flight, and lies to his brother Peter about it. Policeman Matt Parkman uses his telepathic powers to find a girl named Molly Walker, whose parents have been recently murdered by a serial killer called Sylar.