Wild Kratts Season 2 Episode 21 - Rattlesnake Crystal Episode Title:Rattlesnake Crystal.Episode Description:While cruising through the clouds trying to decide where to adventure to next, the Tortuga is forced to make an emergency crash landing in the Sonoran Desert. The Kratt bros are excited to explore this new habitat, but Koki has bad news: the Tortuga will go permanently offline and die forever unless they can find a fresh stock of rare tellurium crystals. The bros go off searching for the rare mineral, but find the search difficult until they stumble upon a western diamondback rattlesnake and learn about its heat vision power, as it hunts a ground squirrel. Utilizing the rattlesnake's unique sensory abilities and creature powers, the bros race against the clock to find some tellurium and save the Tortuga.