DEANNE BRAY, MADELINE ZIMA, DAWN OLIVIERI AND ACADEMY AWARD-WINNER LOUISE FLETCHER GUEST STAR – Peter (Milo Ventimiglia) faces unexpected consequences for his heroic acts and encounters a reluctant new hero (guest star Deanne Bray). As Claire (Hayden Panettiere) continues to adjust to college life, she must figure out how to deal with her ability having been revealed. Meanwhile, Samuel (Robert Knepper) moves heaven and earth to recapture the memories of his late brother Joseph. Elsewhere, Matt (Greg Grunberg) struggles with his internal demons as Sylar (Zachary Quinto) mysteriously resurfaces. Jack Coleman also stars. Assaf Cohen and Rick Worthy also guest star.

ROBERT KNEPPER JOINS THE CAST. RAY PARK, ZELJKO IVANEK, MADELINE ZIMA, AND DAWN OLIVIERI GUEST STAR – Claire (Hayden Panettiere) struggles with adjusting to her new life in college when a mysterious death thrusts her into the spotlight once again. Elsewhere, Hiro (Masi Oka) and Ando (James Kyson Lee) continue their noble quest to help people by promoting their abilities. Angela (Cristine Rose) fears Nathan (Adrian Pasdar) will soon discover his true identity; while Matt (Greg Grunberg) is haunted by an unexpected visitor seeking something he has lost. Tracy Strauss (Ali Larter) and H.R.G. (Jack Coleman) join forces, looking for the key to unlock the motive behind a horrific crime. Meanwhile, Peter (Milo Ventimiglia) uses his abilities for good, but he is soon called upon to aid an old friend. While the heroes adjust to their new surroundings, a mysterious carnival clan, led by ringleader Samuel (Robert Knepper), sets their sights on familiar faces. James Kyson Lee and Zachary Quinto also star. Rachel Melvin, Jimmy Jean-Louis, Ashley Crow, Lisa Lackey, Assaf Cohen, and Saemi Nakamura also guest star.

EMMY AWARD-WINNER ZELJKO IVANEK AND MICHAEL DORN GUEST STAR – Nathan (Adrian Pasdar) faces off against Sylar (Zachary Quinto) to keep him from meeting the President (guest star Michael Dorn). Sylar has his own plans for his new partner. Meanwhile, Hiro (Masi Oka) learns that there are repercussions to regaining his ability. Elsewhere, Matt (Greg Grunberg) is forced to go to extraordinary lengths to protect his future with his family. Jack Coleman, James Kyson Lee, Hayden Panettiere, Sendhil Ramamurthy, Cristine Rose and Milo Ventimiglia also star.

EMMY AWARD-WINNER ZELJKO IVANEK, NOAH GRAY-CABEY AND CLINT HOWARD GUEST STAR – Sylar (Zachary Quinto) continues his unusual partnership and begins to have an unexpected identity crisis. Hiro (Masi Oka) and Ando (James Kyson Lee) take measures toward bringing down Building 26. Meanwhile, Matt’s (Greg Grunberg) new found fatherhood changes his priorities. Elsewhere, Nathan (Adrian Pasdar) sets a plan in motion to right the wrongs of his government operation. Jack Coleman, Hayden Panettiere, Sendhil Ramamurthy, Cristine Rose and Milo Ventimiglia also star. Lisa Lackey and Ellen Greene also guest star.