Continuity mistake: When Mohinder is back in India, his mother tells him that his sister Shanti died at the age of 5, when Mohinder himself was 2. In "The Hard Part", Mohinder tells Molly Walker that Shanti died before he was born, and shows her a photo of Shanti (who looks 5 years old) and his pregnant mother.
Visible crew/equipment: When Claire runs away from Bob after he calls her "Ms. Bennet", you can see Bob's shadow and another person's shadow on the ground. Since no one else was standing next to them, it has to be a crew member, most likely a camera man based on the odd shape of the shadow.
Continuity mistake: When Alejandro finds Maya outside the tunnel, she has black ooze from her eyes running down her cheeks. As he starts his healing, we get a close-up shot of how the ooze fades and disappears from Maya's face. But in the next shot of her face, when she falls forward, the black stuff is back on her cheeks. It's gone again in the next shot of her.
Continuity mistake: When Meredith and Nathan are talking in her trailer, as he says, "I could have been a much better person back then", he has his sunglasses in his hand and places that hand on the table. Cut to a shot from behind him, and his hand is resting on the table with the sunglasses beside it, with no time to put them down and move his hand in between the shots. Also, when Meredith says, "You and me, we were never gonna work out", his hand goes from being on the table to his lap between shots, once again without having had the time to move it.
Continuity mistake: When Charlie invites Hiro over to help celebrate her birthday, the invite is almost immediately after she says "hold that thought" and walks away from his booth. But in that scene in the previous episode, Charlie was already across the room with the other townspeople when she signaled Hiro to come over.
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Continuity mistake: At the end of ep. 1-14, "Distractions", Meredith calls Nathan to tell him about Claire. In that episode he is holding the phone to his ear, with nothing else in it. In the beginning of this episode, when the same conversation is shown, he is holding a pen in the same hand as the phone. Also, in ep. 14 Meredith said to him, "We haven't spoken in a long time, but... Our daughter just found me". In this episode, she says, "We haven't spoken in a long time, but I just had... Our daughter just found me".
Continuity mistake: When Maya is arrested, she starts manifesting her powers on the policeman. In a close-up, we can see the black ooze coming out of her eyes. Cut to a shot from above, when the policeman's eyes turn black and he drops the handcuffs, and Maya's cheeks are suddenly clean again, with no trace of the black stuff.
Factual error: The solar eclipses in the show that affected the characters' powers were referred to several times as "global events". In the episode with the second eclipse it's shown to be visible in locations thousands of kilometers away from each other at the same time. This is simply impossible, since a solar eclipse occurs when the moon passes between the Earth and the sun, casting a moving shadow that can be only about 250 km in diameter (for a total eclipse). The partial eclipse can be viewed in a much wider region, but the eclipse in the show was a total one. It's not a global event, but a local one.
Continuity mistake: Season 2, episode 10, "Truth and Consequences": In the previous episode, "Cautionary Tales", when Noah was brought back to life he regenerated, then sat up, looked around him and said something sounding like "Home". In this episode, when the exact same scene is shown, we see Noah regenerating and sitting up, but this time he just looks straight ahead before lying back down, and does not say anything.
Continuity mistake: In ep. 1-14 "Distractions", when Claire asks Meredith about her father, Meredith answers, "Well, that's complicated. Why don't you let me work on that for next time?" But when the same scene is shown in a flashback in this episode, Meredith says, "Well, that's complicated. He's kind of a big shot".
Continuity mistake: This mistake is repeated in the next episode too. After D.L kills Linderman he is lying face down, his face is flat against the floor and we can see right into the hole in is head, he has already stopped moving. Then after the camera starts to pan around, Linderman's head is now facing right, and we get a good look at his face.
Continuity mistake: In the scene where Mr. Bennet, Matt Parkman and Ted Sprague are at the used car lot, Ted is using his powers to defrost a blue station wagon. As the frost is melting you see "Automatic" written on the windshield. The shot cuts to Bennet and Matt talking by the pay phone. When the Shot returns to Ted, he's finished defrosting, but you see "Low Mileage! 1 Owner" written on the windshield instead. Ted didn't switch cars during the conversation because written on the used car beside the blue wagon is "Like New" for both shots.
Continuity mistake: When Peter and Claude are invisible and walking in New York, just after Claude has released his hold on the T-shirt rack, they bump into a man in a coat. Cut to a different angle, showing the two on camera, and the man in the coat is gone. Instead there are two girls and a man with glasses walking directly behind Peter and Claude, none of whom were there a split second ago.
Continuity mistake: Season 2, ep. 3, "Kindred". When Peter gets the box with his belongings back from the Irishmen, as Caitlin says "Well?" Peter's hands are in his lap. The angle changes to Peter, who answers "Well, what?" and he suddenly has both hands on the box, with no time to move them between shots.
Deliberate mistake: At the plaza, Peter tells Claire to shoot him because there is "no other way". Nathan then comes flying in and declares, "Yes, there is, Claire!" However, Nathan could not have heard Peter and Claire from the distance he flew in and the rushing of air past his ears.
Continuity mistake: Season 2, episode 11, "Powerless":. In Mohinder's kitchen, when Sylar cocks the hammer of the gun he is holding on Mohinder, he is holding the gun with his arm straight and the gun completely level. The angle changes just as Sylar says "Maya, I need you to stay calm", and now his arm is close to his body and bent so the gun is pointing at Mohinder at an upwards angle. There was no time for him to move his arm in between shots.
Revealing mistake: Claire Bennett is accidentally tackled when she and Zach are arguing while watching the football game. Apparently, her neck is badly broken in the fall, even twisted a full 180°. However, if you watch closely as she falls, you can see that she is completely fine, stretching out her arms to take the impact before rolling around. She lands on her front, arms stretched out, all in all well prepared for the landing, and rolls around. In the next shot her neck is twisted in a way that simply wouldn't be possible in such a fall. She would have had to have her head stuck under something before rolling over, which she certainly did not. The guy tackling her did not land on top of her either.
Continuity mistake: While talking to Claire outside the diner, Noah comments that he's looking forward to seeing her at the homecoming game. But in season 1, Noah knew Sylar was going to try and kill Claire at homecoming and had forbidden her from going.
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Continuity mistake: In previous episodes, when we see DL getting into the car as Nikki prepares to shoot him, he pauses for a second and looks around. In this episode, when we see the actual shooting, DL never looks around, he just opens the car door and prepares to get in, without pause.
Factual error: When Hiro and Ando stand in front of a cinema in Berlin, Germany, you can see three movies posters in the background announcing a Buster Keaton festival. The left one shows his movie 'Cops' - but the German title 'Politzisten' is wrong - it should be 'Polizisten'.
Continuity mistake: The second time Hiro goes to the rooftop and tries to save Tadashi he has ink on his face from stopping the photocopier from working. However when we cut back to him from Tadashi the ink has vanished, then when we do get the next shot of him the ink is back on his face again.
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Continuity mistake: In the scene where Sylar and Mrs. Bennet begin to talk, she becomes suspicious about his interest in Claire. When Mrs. Bennet picks up the phone to call her husband, Sylar visibly moves his finger to use his telekinetic power right before the angle changes. In the next shot, Sylar again does the same motion with his finger, but this time the phone is removed from Mrs. Bennet's hand.
Continuity mistake: At the end of this episode, Noah is having a flashback. It shows Claire helping him pick out his new glasses. In this scene, Noah first tells Claire that she is adopted. However, in the episode "One Giant Leap", Claire tells Brody Mitchell that her parents told her that she was adopted when she was really little. In "Company Man" she is around 14 or 15 years of age in the flashback.
Continuity mistake: "Our Father". At the end of the previous episode, "The Eclipse, Part 2", Hiro brought Claire to the rooftop of the Deveaux building to witness Kaito handing over baby Claire to Noah Bennet. To illustrate his point, Hiro showed Claire the exact same thing happening in the "9th wonder" comic book he brought with him, and she can follow the Japanese dialogue from there. But when the exact same scene is shown at the beginning of this episode, Hiro does not show Claire the comic at all.