Sylar (Gabriel Gray) is a fictional character and a primary antagonist of the NBC science fiction drama series Heroes. Portrayed by Zachary Quinto, he is a superpowered serial killer who targets other superhumans in order to steal their powers. He served as the primary villain of the first season and then as a recurring antagonist.
Over the course of seasons two, three and four, the writers depicted Sylar attempting at various times and under different circumstances to become a hero or curb his desire to kill, undergoing relapses at various stages.