When you’ve got a big problem, you need a big idea. And Mark, Kira, Anna and Theo are trying to pull off a couple of the biggest ideas they’ve ever had. They’ve got to deal with the Reaper. They’ve got to escape from the Sea Kingdom AGAIN. And in the end? They have to prevent the walls that hold up the universe from crashing down around them. We know we’re working with Big Ideas. Let’s see if any of them are Good Ideas.