Previously on Heroes (which is said by Mohinder!): Sylar woke up at the carnival as Nathan and then flew back into Peter's embrace. Tracy met Samuel, who gave her a compass. Matt-Sylon told Sylon-in-Matt that he put Nathan in his body, then Matt-Sylon committed suicide by police firing squad. Samuel took Charlie from Hiro to force him to help him go back eight weeks, where he'd killed Mohinder.
Now: Carnival. Hiro, still in his Knight Rider T-shirt, is staring at Charlie's nametag when Samuel spouts platitudes about giving back to the earth. Hiro wonders why he won't give back Charlie, and tells Samuel he's an evil man. But he throws in "butterfly man," making it much less effective. Samuel tells Hiro he can free her if he goes back eight weeks to find Mohinder and get a film that he has. Hiro says he knows Mohinder and doesn't need to time travel to find him, but Samuel says he's dead. Hiro, "You killed Dr. Suresh?" Samuel wants Hiro to go back not to save Mohinder, but to save the film. Once he delivers it, Samuel promises he'll set Charlie free. When Hiro says he doesn't even know if he can time travel anymore, Samuel tells him he'll have to try since Charlie's life depends on it.
Chennai, India. Nine weeks ago. Mohinder's teaching someone about Pangaea when Mira comes out smiling. Mohinder keeps talking about plate tectonics and tells the girls to remember to read a certain chapter. She leaves and Mira tells Mohinder his students love him and he was born to be a teacher. You know, in case we weren't bright enough to realize he's a teacher from that scene of him teaching. He starts to talk about dinner when she finds a box with a giant sign on the side that says "Property of Chandra Suresh." Mira gets annoyed at him for not throwing it away already, but he tells her it's hard to let go. Mira tells him they have a good, simple life here and when he digs into his father's research, he disappears into a rabbit hole. He throws the box in a trash can with a somber look on his face, which seems to satisfy Mira.