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Nathan faces off against Sylar to keep him from meeting the President. Sylar has his own plans for his new partner. Meanwhile, Hiro learns that there are repercussions to regaining his ability. Elsewhere, Matt will do whatever it takes to protect his family

Hiro and Ando take extensive measures to bring down Building 26. As Sylar continues with his unusual partnership, he has an unexpected identity crisis. Meanwhile, Matt begins to realize he has new priorities now that he is a father, and Nathan sets out to try to fix the wrongs of the government operation he began.

With help from Peter, Claire, Nathan, and Bennet, Angela is able to uncover her past, revealing dark secrets that have long remain hidden. Meanwhile, Mohinder learns that his father was involved in a secret government operation.

As Danko continues to be in charge of the operation, someone close to him is put at risk. Bennet's life continues to spiral downhill with his marriage on the brink of its breaking point. Meanwhile, Hiro and Ando bring a special delivery to Matt and Angela delves into her past.

The heroes try to mend their broken relationships as Nathan and Claire seek refuge in Mexico and Peter and Angela hide out in a church. Danko's bid to wipe out the superpowered population intensifies as he unites with a surprising new ally.

The identity of "Rebel" is revealed. Noah wants Danko to let Tracy go in the hope that she will lead them to Rebel. Hiro and Ando continue with the mission that Rebel entrusted to them, to keep the new hero safe.

While Nathan helps Matt defuse an explosive situation, Sylar finally catches up to Samson Gray for a father-and-son chat.

Matt receives a tip from "Rebel" and heads to Building 26 with Peter to save Daphne and find the files that will expose Nathan's government plot. Claire partners up with an unlikely source to smuggle Alex out of the city. Sylar and Luke continue on their road trip, and Sylar begins to recall memories of his father that lead him to the truth about his mother. Meanwhile, The Hunter puts his plan into action, resulting in an explosive ending.

HRG and Matt are thrust into a series of mind games to uncover the truth about Nathan's plans. Peter gets to meet The Hunter in person.

As the President begins to investigate Nathan's activities, Sylar prepares to find his father. Hiro, Ando, and Matt travel to India to find a new ally, and Claire faces her father's wrath to protect a new friend.

Our heroes truly become fugitives, and they are on the run from one of their own. Sylar begins the search for his father, and Matt's paintings reveal a dark fate.

Months after explosions brought down Pinehurst and Primatech, our Heroes try to put the past behind them and begin new lives. Now powerless, Hiro tries to train a reluctant Ando to be a true superhero. Suresh returns to life as a taxi driver, Peter is back to saving lives, and Daphne and Matt try to live as a normal couple. Claire's attempt to live a regular life is cut short when she uncovers a deadly plot orchestrated by Nathan to track down and capture those with abilities. Meanwhile, Sylar begins the search for his real parents.

Hiro and Claire unite in their bid to stop Arthur by traveling back in time. Peter and the Haitian must face Sylar in order to get to Arthur.

The eclipse plays havoc with superpowers, forcing Ando to seek out two comic book fans to help Ando recover his memory. Meanwhile, HRG hunts down Sylar and Elle after Claire is critically injured, and Nathan and Peter help the Haitian in battle against his brother, Brother Samedi.

The dark eclipse plays havoc with the heroes' powers. Arthur orders Elle and Sylar to bring in Claire. Hiro, Ando, and Matt follow Daphne to her hometown to learn what hold Arthur has on her, and Peter and Nathan travel to the Haitian's hometown to recruit him for the war with Pinehearst.

Nathan learns of his father's plans, while Flint and Knox launch attacks on Hiro, Ando, Peter, and Claire. Meanwhile, Matt tries to revive Angela, Sylar meets with Elle, and Mohinder begins testing of his newest superpower formula.

Hiro attempts to delve into Arthur Petrelli's past to uncover the mystery behind him creating a rival company Pinehearst and his hatred towards Angela. Sylar stricken by guilt tries to stop his murderous ways with HRG and Elle vying for his blood. Meredith's training goes up in smoke with the arrival of her brother.

Trapped, Nathan and Tracy must fight to save their lives against Suresh, who has changed dramatically. Elle returns with shocking news for Claire and her family. Meanwhile, Angela tries to convince Sylar to save Peter; Daphne is ordered to kill Matt or she will be killed herself; and Hiro questions Usutu's advice.

As Hiro and the others receive offers to Pinehearst Industries, Peter has a shocking meeting with its founder. Meanwhile, Claire and her mother join forces to save Meredith from Doyle, who has the ability to take mental and physical control of others; and Nathan takes Tracy to Suresh hoping for an explanation of her abilities.

Claire vies to take down Stephen Canfield, a level 5 who can create black holes, but is unaware that others are close behind. Peter leaves the grisly future only to find that the experience has changed him forever. Meanwhile, Hiro befriends Daphne and Knox when Adam Monroe is unable to get them to "the formula"; Suresh's need to fix his research puts Maya in danger; and the true identity of Linderman is revealed.

Peter and his future self travel four years into the future and see a timeline which everyone has abilities. When his future self is captured, Peter turns to an unexpected ally to gain the power he needs to save the world. In the present, Hiro and Ando are forced to ally with Angela Petrelli to recover the missing formula... and seek out the one person who has the knowledge they seek. Meanwhile, Suresh lets his impulses get the best of him; Matt sees his future wife and child in a precognitive vision; and Linderman and Molly make their return.

Four villains -- Knox, Flint, The German and Jesse -- break into a bank and take hostages along the way, leading Angela to send H.R.G. and his new partner after them. Meanwhile, Hiro and Ando follow Daphne, but run into The Haitian along the way; Peter must figure out what he lost in order to prevent a disasterous future; Tracy leaves Washington, D.C. to uncover information about Niki; and Meredith teaches Claire how to fight.

Angela and Peter square off over how to prevent a seemingly unstoppable worldwide catastrophe. Sylar heads up an attack on the Company's main facility, but is shocked by what he finds on Level 5. While battling Elle, a dozen criminals with potentially devastating abilities are able to escape the facility. Meanwhile, Claire makes a discovery about her abilities; Hiro and Ando follow Daphne to Paris; Suresh's research, as well as his relationship with Maya, progress; and Matt finds a guide to lead him through unfamiliar territory.

Moments after the press conference shooting, the identity of Nathan's assassin is revealed, resulting in Peter and Greg delving into an unknown world. Sylar -- now with his powers partially restored -- visits Claire with the motive of giving his powers a boost that would make him an unstoppable force. Across the globe in Tokyo, Hiro and Ando must guard a family secret that, if revealed, could tear the planet apart; and learn that speedster Daphne, may have a hand in a grim future. In New York City, Maya and Suresh have a breakthrough that may change the world forever.

Before the third season premiere, a brief recap of Seasons 1 and 2 and interviews with the cast at the premiere party is shown.