Season Guide
Season 4
Episodes
1
Aired 2009-09-21 on NBC.Claire struggles with adjusting to her new life in college when a mysterious death thrusts her into the spotlight once again. Elsewhere, Hiro and Ando continue their…
2
Aired 2009-09-21 on NBC.Peter 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…
3
Aired 2009-09-28 on NBC.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…
4
Aired 2009-10-05 on NBC.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…
5
Aired 2009-10-12 on NBC.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,…
6
Aired 2009-10-19 on NBC.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…
7
Aired 2009-10-26 on NBC.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…
8
Aired 2009-11-02 on NBC.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…
9
Aired 2009-11-09 on NBC.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…
10
Aired 2009-11-16 on NBC.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,…
11
Aired 2009-11-23 on NBC.Noah 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…
12
Aired 2009-11-30 on NBC.Is greeted by some unexpected visitors and Samuel's grand plan begins to come to fruition. Meanwhile, Peter struggles to accept the truth and takes extreme measures to…
13
Aired 2010-01-04 on NBC.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…
14
Aired 2010-01-04 on NBC.Sylar returns to the Carnival in search of answers and Peter continues to struggle with the loss of his brother. Elsewhere, H.R.G. sets his plan in motion…
15
Aired 2010-01-11 on NBC.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…
16
Aired 2010-01-18 on NBC.Hiro's 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…
17
Aired 2010-01-25 on NBC.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…
18
Aired 2010-02-01 on NBC.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…
19
Aired 2010-02-08 on NBC.In the climactic season finale, everyone bands together in an effort to stop Samuel from taking the lives of thousands. Peter joins forces with his most unexpected…