The friends hunt for treasure inside a dark cave, where their pal Pepper teaches them about echolocation — and shows them there's another way to "see."

When a tornado touches down on the day of Sensei Dave and Jiu Jitsu Joe's wedding, the gang must think up a way for all of the guests to safely gather.

Ada goes looking for a wormhole so she can travel back in time and fix an embarrassing mistake. But what if she never finds one?