Dr. Priya calls in a human heart specialist to help with Lady, a Bonobo chimpanzee with a life- threatening heart condition. Barry, a penguin stuck in molt for almost a year, has hopefully seen the last of his bad hair days, and the zoo also welcomes their newest veterinarian, Dr. Katie Seeley. Out at The Wilds, Dr. Jan and her team anxiously await the birth of resident cheetah Wangari's cubs.