Continuity: In episode 211 "Powerless", Maya's necklace disappears between shots when she accuses Sylar of killing her brother.

Visible crew/equipment: S02E01 "Four Months Later". As the samurai warriors are about to engage the attack, a close-up shot of Hiro turning around reveals the white screen reflected in his glasses.

Plot hole: Chapter One, 'Four Months Later': The police say they have found Angela Petrelli's fingerprint on the photo of Kaito Nakamura, who had been pushed off the top of the building. In the scene where Angela handles the photograph when she is with Kaito, she is wearing gloves.

Continuity: In episode 211 "Powerless", right before Sylar shoot Maya, you can see she already has a bullet wound on her chest.

Factual error: In Season 2, Episode 3, Peter and the Irish family rob the bookmakers and the security guards shoot at them. In Ireland, even the police don't carry weapons. let alone do security guards.

Continuity: 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.

Visible crew/equipment: S02E11 - "Powerless" When Mohinder, Sylar, Maya and Molly are at Isaac's old flat (now Mohinder's lab), as Mohinder and Sylar walks down the stairs, you can see the moving camera crane reflected in the glass behind them.

Continuity: Season one takes place over five weeks. Janice Parkman goes from not being visibly pregnant to being at least five or six months along during the course of those five weeks.

Deliberate "mistake": The newspaper that shows Petrelli's victory has repeated paragraphs through the article. The article seems to be composed of three paragraphs. One paragraph starts with "I was," and two paragraphs start with "The."

Factual error: When they show the comic book and Hiro looks up the artist's address, it is listed as 215 Reed St. 7. The door to the artist's loft clearly says his address is 861.

Continuity: After throwing the laptop, when Mohinder takes the key out of the book, the tape is bunched up and stuck to the key, but in the next shot the tape is fresh and sticking out freely.

Continuity: 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.

Continuity: When Peter is having his vision of New York, D.L. can be seen picking up Micah and running away. When the camera pans out to show Matt holding them back, D.L. is picking up Micah again.

Revealing: The money that Micah dumps out of his backpack is very obviously fake. In fact, the $20 bills have Benjamin Franklin's portrait on them.

Continuity: 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: When Matt Parkman gets thrown out of a window by Niki Sanders, he lands at least a few stories down and has a cut upon his head. The amount of blood on his head differs significantly from shot to shot.

Continuity: 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: 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: 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: When Claire gets killed she is wearing reddish brown boots, with her jeans tucked into them. She's still wearing them when her body is placed on the bed. A few moments later, running from the house with her mother, she's wearing sneakers.