The brothers unveil their biggest and best enclosure yet, a huge new habitat for the Amur tiger sisters Aleena and Siberia. The boys test out the tigers new 80,000-gallon swimming pool and get hands-on as they prepare to move the world’s biggest cats. Meanwhile, the other animals at the park are treated to a bubble show, Tyler has to clean out the tapir toilet and the boys recall their travels to Kenya to see the world‘s last two remaining northern white rhinos.