We're back with another 5-day trivia hunt!

To remind you of the rules: Every day this week, I'll be presenting a specific challenge. Your job: come up with the answers and hold onto them! Why? Because on Friday, you'll need them to solve a short puzzle. The first person to email in the correct answers and successfully show how you arrived at them (thus the title: How Did You Know?) wins a choice of any t-shirt and book from our store.

As with last month, we're also adding some special prizes this time around for those who come really close, but don't get all the answers in time. We've previously awarded some shirts and books to a couple contestants who impressed us with charts, diagrams, and other complex methods of recording and organizing the clues/answers. So we'll be on the lookout for the creative among you, as well. This is all to say: it pays to play whether you nab the grand prize or not. And remember, we're also giving away a really big, sa-weeet prize to any winning contestant who can defend the title three months in a row. Details on that as they develop, if they develop. (Katie Wnuk is our current champion. You can read about her here.)

As with previous How Did You Know? posts, comments have been turned off, but I definitely encourage you to work in teams. Write your friends, send around each daily challenge, conspire, work together, whatever it takes to make sure you're armed with the right answers going into Friday's puzzle.

If you missed Day 1, check that out here. Meanwhile, Day 2 is right over here.

Today we're playing Name That Movie. On each of the following pages there is a short movie clip - an excerpt from a film, or a mini-composite. Your job: name the movies they're pulled from!