The Little Rascals S04E06 - Buried Treasure

The gang gets the idea to search for buried treasure and fashion their own boat to do so. When they reach a seemingly deserted island (actually Catalina), they begin digging. Sure enough, they find treasure. As it turns out, the treasure was put there by a movie production team, and since they have men among them dressed as cannibals and wild animals, they get back at the kids by giving them a good scare.