Secret Society is the tenth episode of Season 4 of Super Robot Monkey Team Hyper Force Go! as well as the 49th episode overall. In it, Valeena continues her quest to obtain the Skeleton King's skull, only to find that it has been stolen. This episode goes into detail about the origin of Valeena.
- Gibson's assertion that frog rain is impossible is actually untrue. Though it is impossible for frogs to be generated in clouds the same way as presented in the show proper, animal rain is a very rare, but very real occurrence in real life. It is caused when massive sea storms pick up aquatic or semi-aquatic life. Said animals can remain in the storm until it dissipates, where they then fall from the sky. The phrase "raining cats and dogs" is thought to have originated from witnesses to this phenomenon.