Season 4 begins with our heroes putting their lives back together. Claire finds that her biggest challenge is forgetting her old life and starting college. Hiro Nakamura goes back to his old life in Japan, but discovers that he has a terminal illness and sets out to fulfill his own personal bucket-list. Peter Petrelli returns to work as an ordinary New York City EMT. H.R.G. is adjusting to life as a single man, but when Mohinder Suresh offers H.R.G. compelling evidence of a new danger, it makes H.R.G. wonder if he should get back in the game. Nathan Petrelli returns to the Senate and begins to notice strange changes in himself. Matt Parkman returns to life as an ordinary family man, but finds something unfamiliar buried deep within his psyche. And a strange and dangerous carnival comprised of a traveling band of outsiders with powerful abilities suddenly poses a grave challenge.

Season 4 Episode 1 - Orientation

Claire, back home in California, begins attending college, but is having difficulty adjusting when a mysterious death of a student during the orientation puts her back in the spotlight. In Japan, Hiro and Ando continue their quest to help people with abilities and go so much as to advertise themselves. Meanwhile, Angela fears Nathan/Syler will discover his true identity. Matt tries to settle down back in Los Angeles and raise his son and not worry about unexpected visitors. Elsewhere, Peter is using his ability for good when a mysterious carnival clan, led by Samuel Sullivan, arrives in town which could spell trouble for him and everyone else. Air Date : 21st-Sep-2009  Read More

Season 4 Episode 2 - Jump, Push, Fall

Claire and her new friend Gretchen investigate the death of Claire's roommate Annie, while Noah comes to Peter for assistance. Samuel and Edgar recover the compass, Hiro realizes his new destiny, and Matt is tormented with mental images from a dangerous foe. Air Date : 21st-Sep-2009  Read More

Season 4 Episode 3 - Ink

Peter faces unexpected consequences for his heroic acts and encounters a reluctant new hero. As Claire continues to adjust to college life, she must figure out how to deal with her ability having been revealed. Meanwhile, Samuel moves heaven and earth to recapture the memories of his late brother Joseph. Elsewhere, Matt struggles with his internal demons as Sylar mysteriously resurfaces. Air Date : 28th-Sep-2009  Read More

Season 4 Episode 4 - Acceptance

As "Nathan" starts displaying new powers, he has visions of an incident from his past involving a young girl and decides to investigate. Hiro tries to save a co-worker and learns a truth about himself. Tracy tries to regain her old life and job. Air Date : 5th-Oct-2009  Read More

Season 4 Episode 5 - Hysterical Blindness

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. Air Date : 12th-Oct-2009  Read More

Season 4 Episode 6 - Tabula Rasa

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. Air Date : 19th-Oct-2009  Read More

Season 4 Episode 7 - Strange Attractors

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. Air Date : 26th-Oct-2009  Read More

Season 4 Episode 8 - Once Upon a Time in Texas

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. Air Date : 2nd-Nov-2009  Read More

Season 4 Episode 9 - Shadowboxing

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. Air Date : 9th-Nov-2009  Read More

Season 4 Episode 10 - Brother's Keeper

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. Air Date : 16th-Nov-2009  Read More

Season 4 Episode 11 - Thanksgiving

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. Air Date : 23rd-Nov-2009  Read More

Season 4 Episode 12 - The Fifth Stage

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. Air Date : 30th-Nov-2009  Read More

Season 4 Episode 13 - Upon This Rock

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. Air Date : 4th-Jan-2010  Read More

Season 4 Episode 14 - Let It Bleed

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. Air Date : 4th-Jan-2010  Read More

Season 4 Episode 15 - Close to You

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. Air Date : 11th-Jan-2010  Read More

Season 4 Episode 16 - Pass/Fail

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. Air Date : 18th-Jan-2010  Read More

Season 4 Episode 17 - The Art of Deception

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. Air Date : 25th-Jan-2010  Read More

Season 4 Episode 18 - The Wall

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. Air Date : 1st-Feb-2010  Read More

Season 4 Episode 19 - Brave New World

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. Air Date : 8th-Feb-2010  Read More