With the election and NYC's destruction looming, Nathan has a disturbing face-to-face meeting with the shadowy Linderman. Meanwhile, Hiro's attempt to steal the sword steers him in a grim new direction.
In Las Vegas, Hiro's plan backfires when he cautiously turns time to his advantage at the gambling tables. Meanwhile, Claire's uncanny healing abilities are put to the ultimate test.
While Hiro convinces his friend that they are destined to travel to America to save the world, a frightened Niki follows instructions from a mysterious, unknown source that directs her to the middle of the desert.
As people around the world find their lives disrupted by their new extraordinary abilities, authorities investigate several bizarre and gruesome murders.
As a total eclipse casts its shadow across the globe, a genetics professor in India is led by his father's disappearance to uncover a secret theory - that there are people with superpowers living among us.
Facing a crisis involving her son Micah, a distraught Niki reveals her personal struggles to a friend. Pushing aside his own issues at home, Matt assists Audrey's investigation into another bizarre murder.
In the aftermath of the showdown against Arthur Petrelli, the Petrelli brothers find themselves battling against one another. Nathan makes a move that will have global repercussions.
A restored Sylar seeks out the carnival to obtain a new batch of powers, but discovers a new weakness. Meanwhile, Claire and Peter try to resolve their emotions at Nathan's wake.
Sylar visits Claire, while Hiro's past decisions manifest subconsciously due to his brain tumour. Meanwhile, Samuel tries to impress Vanessa, his long-lost love, but things don't go as planned.
While being held hostage, H.R.G. is subjected to Matt Parkman's unique brand of interrogation, revealing how he became involved with Nathan's government plot to capture those with abilities.
After receiving a tip from 'Rebel', Matt and Peter race to Building 26 to rescue Daphne and recover files that will expose the government's plans for those with abilities.
Nathan must factor what he's learned from Linderman into difficult decisions that will shape the future - for him, his family, New York City and the world.
Thrown five years into the future, Hiro and Ando discover that people with extraordinary abilities are being registered, imprisoned, hunted and even killed.
Samuel prepares for new additions to his family, while Lydia warns him of the consequences. Meanwhile, Claire discovers that her roommate Gretchen may have a hidden agenda.
H.R.G. 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 get what he wants.
Nathan's determination to save a comatose Peter forces him to turn to Simone for help. Isaac's puzzling "Hiro vs. T-Rex" painting inspires Hiro and Ando to search for the pictured samurai sword.
Chased by unknown assailants, Hiro's search for the sword takes a turn when his father appears. Meanwhile, a cleaned-up Isaac dedicates himself to stopping New York's destruction.
After reuniting Sylar and Elle, Arthur orders them to find Claire and bring her to him. Meanwhile, Nathan and Peter Petrelli travel together to Haiti in search of the only man that can stop their father from destroying the world.
Seeing a future where nearly everyone has abilities - a world destined for destruction - Peter resolves to prevent this earth-shattering end, whatever the cost.
Poised to become a member of Congress and maybe more, Nathan considers the cost to those he loves, along with his mother's advice and Linderman's prophecy.
With Isaac's horrible predictions all unfolding before them, the everyday people with extraordinary abilities face moments of pain and peril in Kirby Plaza with unflinching heroism.