The Big Picture
- Time travel in 'Harry Potter and the Prisoner of Azkaban' introduces the Predestination Paradox, creating a self-fulfilling time loop.
- The Time-Turner is only used in one book and raises questions about why it isn't used to prevent other tragedies in the series.
- J.K. Rowling admitted that using time travel in the series caused problems and retroactively implemented strict rules to avoid plot holes, ultimately destroying all Time-Turners.