All-new stories and animals this season include Dave, a red kangaroo who bounces back from arthritic symptoms after undergoing chryotherapy; breeding komodo dragons; keepers training bats, a golden eagle and Indian gharials; the head-starting of hellbenders, a giant salamander found in Eastern North America, for introduction into the wild; and how a keeper deals with retiring after 31 years of caring for Happy, Patty and Maxine, the zoo's three female Asian elephants.