When Sylar (Zachary Quinto) comes face-to-face with his long lost father (guest star John Glover), the reunion proves to be what he least expected. Elsewhere, after receiving a tip from "Rebel," Claire (Hayden Panettiere) must decide if she will help her sworn enemy, Eric Doyle (guest star David Lawrence XVII), evade capture. Meanwhile, as "The Hunter" (guest star Zeljko Ivanek) plans to uncover the Petrelli family's secrets and take control of Nathan's (Adrian Pasdar) operation, Matt (Greg Grunberg) finds himself in the spotlight and on the verge of leveling Capitol Hill.I’m hugely encouraged by the clip below, in which the cheerleader finds herself stranded in a sea of horny comic-book nerds: NBC execs indicated last week that “Heroes,” still NBC’s top-rated drama despite a huge plunge in ratings over the past two years, would receive an 18- or 20-episode fourth-season order. Fuller, currently working under a newish two-year contract with NBC Universal, intends to remain with “Heroes” into season four. The first and only season-three “written by Bryan Fuller” episode, “Cold Snap,” airs in two weeks. Five more third-season episodes will air after that. 9 p.m. Monday. NBC.