Episode Title:Attack of the Tree Eating Aliens.Episode Description:The Wild Kratts learned that two kids' forest clubhouse is dying. They must investigate and solve the tree-killing mystery. At first, Aviva and Koki think that woodpeckers did it but Martin gets trapped in a tree while he's miniaturized and sees a longhorn beetle, a species from China transferred by ships, munching on trees and invading habitats to fight. The Kratt Brothers must save the forest trees with woodpecker powers before the longhorn beetles get rid of all of them. Will they get rid of the longhorn beetles and return them in time?