It's not always a bad thing for a movie or TV series to leave us with a head full of questions, and it can be fun to speculate and answer these burning questions by imagining our own storylines that solve the mystery.
But many of these mysteries already have answers that were included in the show so subtly viewers may have missed it- like the mystery of why a film crew is following around Dunder-Mifflin employees:
Shortly before the events of The Office, a Dunder Mifflin employee committed suicide. This was revealed during the show's second season. In the episode "Performance Review," Michael Scott cleans out a suggestion box that's been gathering dust for years. In the box is a suggestion from a man named Tom that the office should provide better counseling for depressed workers. Michael doesn't know who that is, and so another character mimes blowing her brains out.
That's why the camera crew is there: A man killed himself, and the filmmakers wanted to document how his friends were dealing with it. The really sad part is that no one really seems to care. According to the writers, Ryan the temp was hired almost immediately after Tom's suicide, because death or no death, Dunder Mifflin is a business that cannot shut down, or even slow down, just because someone lost a battle with depression. Huh, you know, maybe The Office was more realistic than we gave it credit for.
Another enduring pop culture question that has an answer- why didn't the Good Witch tell Dorothy she could use the ruby slippers to return home if she supposedly knew the whole time?
That's because the book features two Good Witches- Glinda, the Good Witch of the South and Locasta Tattypoo, the Good Witch of the North met by Dorothy in Munchkin Country.
In the book Locasta tells Dorothy how to use the ruby slippers, since Glinda doesn't have a clue about the shoes, but in the movie the Good Witches were merged and an inconsistency was born.