Time Month - Editorial - The wrong type of paradox?

It's Time Month

And it's time to look at a thorny issue with time travel, Paradoxes. Does a paradox in itself spoil the plot? Not usually but when a movie is careful with its time travel rules, it's often quite jarring to see them disregard them. I'm going to looking at examples across the board, not necessarily just things I've reviewed and see where they stack up. Spoilers ahead folks

Harry Potter Month - Mini Review: Harry Potter and the Prisoner of Azkaban

Chris Columbus steps down as director and there are some significant changes in style as a result, most of which stick throughout the remaining films. Obviously the death of Richard Harris resulted in a recast for Dumbledore. Sir Michael Gambon took the role.

It was produced with a $130m budget and made $796.7m at the box office, which, whilst still successful, is the least of any Harry Potter movie. I’ll suggest a possible reason for the boost when I do the review for the next film, but let’s take a look at this one first.