The new and different Sylar pays Matt a visit, while Peter tries to warn Emma that Samuel isn't what he seems. Meanwhile, Noah begins his plan to infiltrate the carnival and capture Samuel.
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.
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.
Peter and Matt are thrown into unexpected, uncharted territory. Meanwhile, in Tokyo, Hiro and Ando are charged with safeguarding a family secret that could split the planet apart.
Trapped and terrified, Nathan and Tracy fight for their lives against a much-changed monstrous Suresh. Meanwhile, Elle returns with a shock for Claire and her family.
To prepare for the confrontation ahead, Hiro follows respected businessman Arthur Petrelli in the days before he 'died' to discover what drove him to create rival company Pinehearst and strike at Angela.
Seeing a future where nearly everyone has abilities - a world destined for destruction - Peter resolves to prevent this earth-shattering end, whatever the cost.
Armed with H.R.G.'s old files and a taser, Claire attempts to take down her first target: Stephen Canfield - a Level 5 escapee with the ability to create black holes - unaware that others are closing in.
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.
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.
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.
As Danko spearheads the government operation, someone close to him is put in the line of fire. Meanwhile, H.R.G.'s life continues to spiral out of control.
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.
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.