Wild Kratts Season 4 Episode 13 Spirit Bear Episode Title: Spirit Bear Episode Description: Chris, Martin, and Aviva kayak to an island to look for black bears. When they get there, Aviva catches a glimpse of a white bear; however, the Kratt Brothers do not believe Aviva and tell her that there are no polar bears on the island. But when the white bear reappears, Chris and Martin realize that the bear is no polar bear-it's a spirit bear, a variety of black bear that sometimes has white fur. Meanwhile, a new villain, Paisley Paver (Julie Lemieux) and her assistant, Rex (Cory Doran), arrive on the island, planning to pave it and build a mega storage facility. To stop this new enemy from destroying the bears' home, the Kratt Brothers will need to use the incredible Creature Powers of the black bear.