Hiro and Claire went back in the past to try to change who received the catalyst in Heroes Season 3 Episode 12. They succeeded, as Hiro was injected with it instead of Claire. Too bad Arthur showed up to steal the catalyst and trap Hiro on a light post.
Even though Arthur’s dead, Nathan doesn’t want the plan to die along with him. Peter’s not interested in continuing the plan, though.
Sylar breaks the news of Arthur’s death to the others and tells them he’s going to prove to them they’re all monsters, too.
Claire tells them her weakness, which she believes is Sylar’s weakness as well since he’s got her healing ability.
Meanwhile, 16 years ago, Hiro’s still hanging on a pole, asking a pigeon to help him.
Suresh’s infection has spread to his lungs, and he believes he’ll die if he doesn’t inject himself with the formula. Except the formula is stolen from him out of thin air. Daphne gives it to Ando, who hopes to become a time traveler, even though Matt warns him that he may end up just like Suresh.
Hiro manages to no longer be on the pole. He returns to his house to ask himself for some help finding the formula.
Sylar tells Claire that, if she kills Angela, he’ll allow them to leave. She’s not interested in the deal.
HRG goes to find a bunch of mad dog killer types, offering them their freedom in exchange for bringing them Sylar’s head. They’re just bait.
Peter, likewise, is working with some thugs, who say he’s one of the good guys now.
Ando tries to use his new time traveling power. Except he doesn’t have a new time traveling power.
Creepy puppetmaster guy is up first, but he can’t control Sylar and joins the list of casualties.
Then Sylar pumps Meredith with adrenaline so she can’t control her fire. Sylar tells HRG that the glass is bulletproof, and that he might need the one bullet he’s got left to eliminate the threat.
Nathan tells Knox he’s backing the wrong horse because Peter always loses. After they get into a fight, Tracy’s back, and her freezing power proves to be the difference.
Ando’s having trouble controlling his power, whatever it is. When Parkman touches him, he’s able to hear every thought of every person in the city. When Daphne touches him, she splits into two Daphnes. She thinks she traveled back in time, a few seconds anyway.
Sylar tells Claire he’s raised the stakes. Save daddy or save Angela. She goes downstairs, but Sylar ripped the keypad out of the wall. HRG has Meredith press her hands against the window with as much heat as she can, then Claire jumps through the glass to free HRG. Claire grabs her dad and runs off but tells her mom she’s coming back for her.
Tracy tells Nathan they need a new game with their own rules, which they can do as long as they get the formula. So he fires her.
Daphne and Ando plan to go back in time to where Hiro was. Not that they know it’ll work.
Hiro’s dad catches him hanging around and pulls out a sword. Hiro rips up the formula into two pieces, then disappears. Daphne and Ando have managed to track him down and bring him back to the present.
Hiro and Daphne arrive to tell Tracy they need the formula. She says she’s got plans for the formula and calls him Pikachu. Punching her and stealing the formula turns out to be an effective idea, though.
Once they’re done destroying the formula, Flint wants to blow up the building, whether there are people inside it or not. Nathan comes up and knocks Flint out, then he turns his attention to Peter. This fight is ended by Flint setting the place on fire as planned. Peter injects himself with the formula, and he flies out with Nathan.
Angela admits to Sylar that she’s not his mother. He forces some more truth out of her, which includes that he’s a monster, not a hero. The good news is that she knows who his real parents are. He’ll have to leave her alive to get any more out of her. As he’s trying to force the truth out, Claire knocks him down.
Claire goes back to save her mom, too, but they’re forced to leave as she explodes the building.
Now Peter’s got flying ability, and he saved his brother because he’s his brother, even if Nathan wouldn’t have done the same.
Hiro’s got the formula and tears it up.
So concludes volume three. Volume 4, Fugitives, begins February 2, 2009 when Heroes returns. Nathan wants to get the government involved to round up all the heroes and put them in a facility where they won’t be a danger.