Seasons & episodes
S4 · E5Hysterical Blindness 2009-10-12 · 43 min
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 unexpected way to connect with Emma, who would prefer to stay distant. Elsewhere, a different side of Sylar emerges as he desperately tries to remember the person he used to be.
S4 · E6Tabula Rasa 2009-10-19 · 43 min
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. Meanwhile, Peter enlists HRG to help him find a healer who can save Hiro’s life.
S4 · E7Strange Attractors 2009-10-26 · 43 min
Matt goes to extreme measures to extinguish Sylar , who continues to torment him. Elsewhere, HRG calls in a favor from Tracy to save a troubled young boy whose misfortunes resemble her own. While Claire and Gretchen are being hazed by their new sorority sisters, they realize pledging might not be their biggest problem.
S4 · E8Once Upon a Time in Texas 2009-11-02 · 43 min
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. Elsewhere, H.R.G.’s past with his Primatech partner is revealed.
S4 · E9Shadowboxing 2009-11-09 · 43 min
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 ability is a perfect fit for his job and gives him the opportunity to help Emma accept her new life. Elsewhere, Sylar's battle at gaining full control over Matt's body escalates with potentially dangerous implications at stake.
S4 · E10Brother's Keeper 2009-11-16 · 43 min
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. Elsewhere, Sylar continues his battle with Matt.
S4 · E11Thanksgiving 2009-11-23 · 43 min
H.R.G. hosts an untraditional Thanksgiving dinner. Elsewhere, the Petrelli family gets a surprise guest at their table. Meanwhile, Samuel continues to hold Hiro hostage, as Lydia goes in search for the truth.
S4 · E12The Fifth Stage 2009-11-30 · 43 min
Unexpected visitors greet H.R.G.; Samuel's plan starts to come to fruition; struggling to accept the truth, Peter takes extreme measures to get what he wants; Claire's journey leads her to an unexpected destination.
S4 · E13Upon This Rock 2010-01-04 · 43 min
As Claire becomes immersed into the world of the Carnival, she becomes increasingly suspicious of Samuel's motives. Hiro is on a mission to rescue one of his own, but has difficulty communicating his intentions to Ando.
S4 · E14Let It Bleed 2010-01-04 · 43 min
Sylar returns to the Carnival in search of answers, H.R.G. tries to forge an alliance with Edgar and Peter continues to struggle with the loss of his brother.
S4 · E15Close to You 2010-01-11 · 43 min
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. Meanwhile, Hiro and Ando go to extreme lengths to save Dr. Suresh. Elsewhere, Peter's introduction of Emma to his mother brings forth visions of a very grim future.
S4 · E16Pass/Fail 2010-01-18 · 43 min
Hiros life hangs in the balance as his brain tumor worsens, prompting him to subconsciously deal with some of his past decisions. Meanwhile, Sylar pays Claire an unexpected visit to get answers as to why he isn't quite himself. Elsewhere, Samuels plan to impress his long-lost love, Vanessa, takes a terrifying turn.
S4 · E17The Art of Deception 2010-01-25 · 43 min
H.R.G. enacts his plan to take down the Carnival with the help of Lauren and Suresh. Sylar visits Matt looking to understand his desire to make a human connection, but Matt has a plan of his own. Meanwhile, Peter warns Emma of Samuel's intentions after his grim vision of the future.
S4 · E18The Wall 2010-02-01 · 43 min
Fueled by his vision of Emma in grave danger, Peter attempts to rescue Sylar from his worst nightmare. At the carnival, Samuel reveals H.R.G.s secret past in order to bring Claire to his side. Meanwhile, Lauren makes a bold move to put a stop to Samuel.
S4 · E19Brave New World 2010-02-08 · 43 min
Everyone bands together to try to stop Samuel from taking the lives of thousands. Peter joins forces with his most unexpected ally to save Emma. Meanwhile, H.R.G.'s life hangs in the balance as he and Claire find themselves trapped underground with oxygen quickly running out. Elsewhere, Hiro starts to come to grips with the decisions he has made and is called into action to help stop a disaster.