12 Huge Problems With Harry Potter Movies (Nobody Admits)
2. The Marauder’s Backstory – The Prisoner Of Azkaban
Towards the end of The Prisoner of Azkaban, the truth about Sirius Black is revealed. The audience learns that Scabbers (Ron’s rat) is actually Peter Pettigrew and that it was he who betrayed Harry’s parents and murdered a street full of Muggles, not Sirius. And Lupin also reveals that he’s a werewolf – which is why he’s been missing classes.
However, the details of this backstory are never explored. You wouldn’t know from watching the film who created the Marauder’s Map or why they knew so much about Hogsmeade and the Hogwarts grounds.
Most frustratingly of all, those who haven’t read the book will not know that Harry’s Patronus – which takes the shape of a stag – is the same animal James Potter transformed into as an Animagus.
It’s a real shame because The Prisoner of Azkaban is such a terrific movie, yet the filmmakers managed to miss out what many Harry Potter fans consider to be the best backstory in the whole franchise.