1.18 “Parasite”

Mohinder figures out that Zane is Sylar. He proceeds to torture Sylar. Then Sylar tortures Mohinder. Then Peter loses the emo-bangs and the world weeps. Meanwhile, FBI agents approach Nathan to discuss Linderman’s downfall. It goes awry. Jessica kills the agents and Linderman entices Nathan with ideas of presidency. Hiro gets his sword. His powers immediately return. And Claire ditches the Haitian to go find Peter. She finds Grandma Petrelli, who reveals that she’s the one giving instructions to the Haitian. Despite a ton of plotholes and inconsistencies, it’s an amazing hour for story twists and character arcs.