Common people discover that they have super powers. Their lives intertwine as a devastating event must be prevented.
Cast: Jack Coleman, Hayden Panettiere, Milo Ventimiglia, Masi Oka, Greg Grunberg, Sendhil Ramamurthy, James Kyson, Adrian Pasdar, Zachary Quinto, Ali Larter, Cristine Rose, Ashley Crow, Jimmy Jean-Louis
Samuel's ultimate plan spells disaster for thousands - Ray Park, Deanne Bray and Elisabeth Rohm Guest Star.
Peter is forced to travel into Sylar's mind to ask for him to save Emma and the two of them find themselves in a limbo state-like deserted city where they try to find a way out.
H.R.G. enacts his plan to take down the Carnival with the help of Lauren and Suresh.
Hiro's life hangs in the balance as his brain tumor worsens, prompting him to subconsciously deal with some of his past decisions.
H.R.G. recruits Matt to help him take down Samuel, as they use his long-lost love, Vanessa, to lure him to them, but Samuel has his own plans for Vanessa in the works.
Claire attends Nathan's funeral while Peter struggles with his grief in his own way by wanting to seek revenge. Meanwhile, Noah and Lauren interrogate a captured Edgar for information to where to find Samuel's carnival
Samuel goes off and tries to bring Emma into the fold by manipulating her about how special her sight-of-sound powers are, while back at the Sullivan Brothers Carnival, Claire becomes more more suspicious about Samuel's intentions and deals with not only Samuel's right hand, Replicating Man, Eli, but also the Puppet Master Eric Doyle
H.R.G. is greeted by some unexpected visitors and Samuel's grand plan begins to come to fruition.
H.R.G. hosts a non-traditional Thanksgiving dinner by inviting Claire over at his apartment for dinner. But the dinner becomes more awkward and uncomfortable when Noah invites his former ...
Samuel learns just how powerful he can become and takes dangerous measures to reach his full potential. Meanwhile, as Tracy begins to lose control of her ability, one of her own comes in harms way.
Claire is determined to get to the bottom of the Sorority Rush attacks on her own, until H.R.G. intervenes only to realize he may be the source of her troubles. Meanwhile, Peter's new ...
When Hiro travels three years into the past, he has a second chance to save Charlie from the hands of Sylar. However, Samuel's presence serves to complicate Hiro's mission even further. ...
Matt goes to extreme measures to extinguish Sylar, who continues to torment him. Elsewhere, H.R.G. calls in a favor from Tracy to save a troubled young boy whose misfortunes resemble her ...
Under Samuel's guidance, Sylar starts on a path to rediscover his true identity. Hiro helps Emma accept and understand the great possibilities that go along with having an ability. ...
Samuel prepares for new additions to his family, while Lydia warns him of the consequences. Claire discovers that her roommate Gretchen may have a hidden agenda. Meanwhile, Peter finds an ...
As Hiro's life continues to hang in the balance, he distracts himself with saving the lives of others. Meanwhile, Angela tries to help the new "Nathan" remember his past, at the risk of his...
Peter must face the consequences of his actions and also meets a new female hero. Claire deals with others knowing about her ability. Samuel fights to find his brother Joseph's memories. When Sylar returns, Matt must struggle with his own inner demons.
Claire discovers her roommate has been killed. HRG asks Peter to help him and ends up in a difficult situation. Hiro tries to undo his wrongdoing from the past and Matt finally decides to use his powers again.
Our heroes are trying to find ways to cope with recent events. Some (Claire, Matt) trying to find normality and others (Hiro, Ando, Peter) trying to use their abilities to do good. Angela worries about Sylar, and a new threat arrives in the form of a mysterious carnival.