Harry Potter and the Half-Blood Prince

Revealing mistake: It is not what is seen here that is the problem, but what we don't see on the Hogwarts Express; first on the way to Hogwarts when Harry, Ron, and Hermione are in their compartment talking about Draco, and second, during holiday break, when Harry and Ron are talking about Unbreakable Vows. As the camera faces the large compartment window, we see the scenery out the window, but as the train speeds along, the scenic reflection of the windows opposite it, in the corridor, should be seen but isn't. What is reflected is the light colored wall of the compartment beneath the blacked-out window. The camera filming the shots from this angle is positioned at that window, and to hide the camera/crews' outline, the window was covered.

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Revealing mistake: Immediately after Katie is cursed by the necklace, Harry, Ron and Hermione are in Mcgonagall's office talking about what they saw in Hogsmeade. Harry says, "It was Malfoy." As both teachers turn Mcgonagall says,"That is a very serious accusation, Potter." As she says this, she looks oddly transparent. You can see the window pane design through her robes, particularly in the shoulder. This continues to be true until she says "I suggest you go back to your dormitories." This could possibly signify a green or blue screen behind them. (00:54:10 - 00:54:40)

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Suggested correction: She's not transparent. It's a trick of the camera. A glare from the bright window behind her. You notice you can't see the vertical slats of the windowpane. Only the horizontal. That's because the glare is carrying across her body horizontally and where the horizontal slats are there's no light to cause a glare.

Garlonuss Premium member

I can see the horizontal and vertical ones through both McGonagall and Snape. I can even see the desk through the middle of her body.

Harry Potter and the Half-Blood Prince mistake picture

Revealing mistake: During Quidditch tryouts, when Ron blocks the Quaffle with his head in the closeup, Ron's body disappears at the bottom of the screen below the digital editing line. (Only visible on fullscreen DVD).

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Revealing mistake: Harry and Dumbledore apparate onto Professor Slughorn's street, and Harry says "I just apparated, didn't I?" As Dumbledore is answering, ("Indeed. Quite successfully too, I might add.") the shot pans out. Look at Dumbledore's "burnt" hand. The green glove they used to make his hand look blackened is visible on his fingers. It is also visible when he turns and starts walking away from the camera. It is not due to the lighting, as it is not visible in the next shot as they both walk away. (00:05:15)

Revealing mistake: In the office building at the beginning of the film, the scene is located inside a meeting room of the very famous Swiss Re tower in London. But at the same time, the camera shows the Swiss Re tower through the window. (00:01:20)

mvbarq

Continuity mistake: In Potions class, when Hermione stands before the cauldron explaining what she is smelling in her closeup, we see Neville behind her with the broad space to his right (viewer's left), just as she says, "Spearmint toothpaste". In the instant cut to the wideshot, Harry is now shoulder to shoulder with Neville, too fast for him to suddenly be standing that close to Neville. (00:34:35)

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Trivia: Young Tom Riddle is played by newcomer Hero Fiennes-Tiffin, who is the nephew of Ralph Fiennes, the actor who plays Lord Voldemort, aka Tom Riddle.

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Question: Instead of using the Pensieve to view Voldemort's and Slughorn's memories, wouldn't it have been much easier for Dumbledore to simply tell Harry of his first meeting with Tom and Harry simply asking Slughorn what he knew?

Answer: The purpose of the Pensieve is to preserve the memory exactly as it was recorded. Telling Harry something years after an event occurred is not as effective or as accurate as seeing. It is more impactful if Harry can watch events exactly as they unfolded. Regarding Slughorn, he had refused to give his complete memory because he was ashamed of the unintentional part he played in Voldemort's plan to create the Horcruxes. He was duped by Riddle, but he still did not want anyone to know how foolish he was.

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Answer: Dumbledore went to great lengths to recover the modified memory from Slughorn and convince him to return to Hogwarts as a teacher. Asking Slughorn about the memory upfront would greatly reduce their chances of getting the rest of the memory. It was important for Harry to charm Slughorn because that was one of his weaknesses. He held Harry's mother in high regards, so Harry really was the only key to getting the memory.

Answer: It would have been pointless for Harry to simply ask Slughorn about Riddle because, as Slughorn previously did, he would react angrily, simply refuse, lie, or alter or delete facts as it was too painful and he was too ashamed to admit what he'd done. Even if Slughorn did tell him, memories are tricky, and, over time, people recall facts differently than what actually happened. Dumbledore needed the pensieve for both his and Slughorn's memories so Harry would have an accurate as possible picture of what happened. This is also J.K. Rowling's magical world. It would be pretty dull, literary-wise, to simply have Dumbledore or Slughorn tell Harry what happened.

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