Question: When Harry and Hermione are rescuing Sirius, Hermione blasts open the door using a different spell than the one she used in The Philosopher's Stone to open the door to where Fluffy was. I can understand that the reason the spell would be stronger on Sirius's cell is so he can't escape and it's more secure. But the Philosopher's Stone had to be secured well, so why was the lock so easy to unlock?
Answer: It's never stated that one spell is stronger than the other. There may be different spells that achieve similar results, and Hermione simply chose one over the other. Therefore, it should not be assumed that one lock was easier to open than the other. Also, the "bombarda" spell was never mentioned in the books. It was invented by the filmmakers for the movie, probably because it sounded stronger and was more descriptive (as in to bombard).
Question: When Harry and Hermione go back in time to save Buckbeak, they both see Professor Dumbledore turning around and pointing something out to Fudge, Malfoy and the executioner. This was obviously done to distract them so Harry and Hermione could rescue Buckbeak but how could past Dumbledore know that future Harry and Hermione would be there to save his life?
New this month Answer: Dumbledore is an immensely powerful wizard who detected them before he saw them.
New this month Answer: Either the lighting made the shoes' color appear different, or she was wearing different shoes at different times when the scene was being filmed. One scene is filmed over multiple days, and actors usually have more than one set of a particular costume in case the clothing is damaged, gets dirty, etc. so her wardrobe might have changed slightly throughout and she could have been wearing a different pair of shoes.
New this month Answer: She could have been looking at Remus and Pettigrew, who exited from the tunnel behind her, Ron, Harry, and Sirius. She probably also heard Snape making his way through the tunnel shortly after that. He was the last to exit from the Shrieking Shack after being knocked out by Harry's spell.
New this month Answer: Because it was at that moment she understood what Dumbledore had meant when he said earlier that more than one life could be spared - meaning that both Buckbeak and Sirius Black could be saved.
Question: Even though Pettigrew valued his own life over his friends, why not just lie and tell him they went to Ireland to keep them safe?
New this month Answer: Wizards have access to veritaserum, the truth potion, and there are others who can use legilimacy to read minds. Any lies Pettigrew told would be exposed eventually.
Answer: They can be overheard discussing Ron's injured leg. Hermione says she's sure that Madam Pomfrey will be able to fix it in no time. Ron's being overly dramatic, saying it might have to be chopped off.
Answer: Because Snape had let it be generally known that Lupin was a werewolf. Previously only the Hogwarts faculty knew about this, and kept it secret. Snape still hated James Potter and Sirius Black for them mistreating him when they were all students at Hogwarts. Although Lupin never treated him badly, Snape still resented Remus for being friends with James and Sirius (Lupin was one of the four Marauders of the "Marauder's Map"). As Lupin told Harry, once the parents found out about his condition, they'd be contacting Dumbledore, protesting a werewolf teaching their children. It also fulfilled the curse that Voldemort had placed on the Defense Against the Dark Arts teaching position: no instructor lasts more than one year.
Question: Why did Hermione and Harry try to stop Ron from getting Scabbers back? They surely don't want their best friend's pet to go missing? They couldn't have been worried about getting caught since they were so far away?
Answer: For one, students are forbidden to be outside the castle at night and, second, it was believed that Sirius Black was hunting Harry because he wanted to kill him, making it dangerous for Harry to be out. The dementor guards are also roaming the castle grounds, and Dumbledore had warned students that they cannot not distinguish friend from foe. They had already attempted to attack Harry twice. Also, if Harry, Ron, and Hermione were caught being outside, they would also get in trouble for having been at Hagrid's right before Buckbeak's execution. Students would not be allowed to be present at an event like that.
Answer: There's no reason given and it is not part of the story line. Most likely, at some point during the filming of this scene, Emma Watson suffered some minor injury and needed to wear a bandage.
Question: Does anyone know why in some scenes with Malfoy and Crabbe that there's a tall, skinny, nasty looking kid accompanying them instead of Goyle? Did Cuaron think the actor who plays Goyle was looking too cuddly and teddy bear-like?
Answer: The character that you see is actually Blaise Zabini and he is standing with Goyle not Crabbe. Harry turned into Goyle in Chamber of Secrets and Ron turns into Crabbe. The actor who played Crabbe was actually arrested for growing marijuana in his home so the director had to replace him.
Question: Maybe this has been brought up before, but I haven't been able to find a discussion of this particular time-turner question. If they went back in time and ensured Remus took his potion, wouldn't it sort of solve all of the problems? He wouldn't turn, Pettigrew would still be captured, Sirius would be proven innocent and not forced into hiding, and Lupin could still teach at the school. I know they aren't supposed to know that he is a werewolf in the past, but they could at least mention the moon or something! I know that there are a million other ways it could have gone, but this is one I haven't seen discussed.
Answer: There's no particular answer to this. When Dumbledore had Harry and Hermione go back in time to save Sirius and Buckbeak, he may have wanted to minimize any chance of them causing irreparable harm by changing too many events. The Ministry of Magic strictly controlled how the Time Turners were used and by whom for a good reason. As Hermione mentioned to Harry, horrible things could happen to wizards who meddled with time. It may simply have been too dangerous to add that on to Harry and Hermione's primary mission. Dumbledore may also not have had all the facts about what transpired inside the Shrieking Shack, and he needed to act quickly. He also knew that due to the curse Voldemort put on the Defense Against the Dark Arts teaching position that Lupin would not last longer (one year) than any previous instructor and there was no point in attempting to change that. It also serves the movie's and the book's story lines for the events to unfold as they did. Sirius' unproven innocence was carried over into the next book/movie, and unfortunately, it ended tragically for him.
Answer: In the pumpkin patch, Hermione turned and glimpsed the "other" Harry and Hermione hiding behind the trees. She either thought she'd imagined it or else she realised that it was her time-traveling self and could not let Harry and Ron know what was going on.
Answer: Hermione did not cry that often during the series. When she did, it was minimal. Actors can become so immersed in the scene that they feel the emotions they are portraying and produce real tears. Actors also use eye drops to simulate crying.
Answer: They stayed behind the pumpkins until they were sure no one would see them. As for when they were running up the hill, they are kids and act on impulse when in a difficult situation. Most likely they were not thinking about what they would see or Hermione's reaction to it.
Answer: Ron fears all of those things. It took the boggart a moment to decide what Ron feared the most.
Question: How come Harry, Ron and Hermione in the past don't see the future Harry and Hermione save Buckbeak? In the first part, Harry, Ron and Hermione stop above Hagrid's house to watch Buckbeak's death so surely they must have also seen the future Harry and Hermione save him?
Answer: Future Harry and Hermione grab Buckbeak when the past trio are walking up the hill. Once they reach the top of the hill, foliage blocks their view of where Buckbeak is.
Question: Why didn't werewolf Remus kill the marauders in animagus from? What difference did it make if they were in animal form then human form?
Answer: Remus, when in his werewolf form (and before the werewolf potion was invented) did not display aggression towards any other animals, only humans. This allowed James, Sirius and Pettigrew to be able control him at all times when they were transformed into their animagus forms.