Claire (Hayden Panettiere) struggles with adjusting to her new life in college when a mysterious death thrusts her into the spotlight once again.
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.
New mysteries are unearthed as a reluctant new Hero is introduced. Deanne Bray, Madeline Zima, Dawn Oliveri and Academy Award-winner Louise Fletcher Guest Star.
The Heroes are trying to assimilate back into their old lives -- Robert Knepper, Ray Park, Bruce Boxleitner and Swoosie Kurtz guest star.
Self-discovery rocks their world as our heroes encounter new abilities, try to recall past lives and stumble upon an unexpected kiss -- Madeline Zima, Dawn Olivieri, Deanne Bray, Tessa Thompson, Ernie Hudson, Ray Park and Academy Award-winner Louise Fletcher guest star.
Sylar begins his journey to find his identity and Peter comes to the rescue of one of his own - Ellen Greene, Ray Park, Dawn Olivieri, Deanne Bray and Ernie Hudson guest star.
The Heroes attempt to rescure themselves and others without the use of their powers.
Hiro gets a second chance to save the love of his life - Jayma Mays returns as Charlie.
Claire learns the truth behind the attacks and Sylar takes matters into his own hands. Jimmy Jean-Louis, Madeline Zima, Deanne Bray, Dawn Olivieri and Tessa Thompson Guest Star.
The truth sets our heroes on new and dangerous paths.
Thanksgiving unites families together and brings new revelations.
Samuel starts to see his vision take shape.
The search for answers intensifies as final respects are paid to a fallen hero. Todd Stashwick, Saemi Nakamura, Sasha Pieterse, Dawn Olivieri, and David H. Lawrence XVII Guest Star.
Sylar (Zachary Quinto) returns to the Carnival in search of answers and Peter (Milo Ventimiglia) continues to struggle with the loss of his brother. Elsewhere, H.R.G. (Jack Coleman) sets his plan in motion to take down the carnival. Cristine Rose also stars. David H. Lawrence XVII, Ray Park, Dawn Olivieri, Elisabeth Rohm and Dawn-Lyen Gardner guest star.
H.R.G. exposes Samuel's greatest weakness in an effort to stop him - Lisa Lackey, Dawn Olivieri and Elisabeth Rohm guest star.
The verdict of an unexpected trial could mean the end of Hiro - George Takei, Tamlyn Tomita, Madeline Zima, Dawn Olivieri and David Anders guest star.
The tables are turned as H.R.G. attempts to gain the upper hand.
Sylar's worst fears come to life as H.R.G faces his past - Eric Roberts, Madeline Zima, Deanne Bray and Elisabeth Rohm Guest Star.
Samuel's ultimate plan spells disaster for thousands - Ray Park, Deanne Bray and Elisabeth Rohm Guest Star.