Okay, after further review the answer for #16 Down could be either century. So I'm going to call that one a gimme question -- if you answer it the way it fits in the puzzle it will count as a bonus. But if you get it wrong, it won't count against you either. Fair enough?
And whoops! I cropped the image too much and accidentally cut off the last line of #18 down. It should read: What is the name of the mermaid from "On Stranger Tides?" Sorry about that!
And that is all the "extra" clues I am giving to you.
~ M2J