Robert continues his father's legacy as he faces off with Bosco, the most aggressive croc at the zoo; Bindi lends a hand when a koala needs eye surgery.
The Irwins go to the Steve Irwin Wildlife Reserve, Robert leads his first croc-catching team, and Bindi and Chandler have a life-changing announcement.
An anxious Robert looks on when Indah the Komodo Dragon meets Gili, an aggressive potential mating partner. Terri handles a lump inside Jessie the woma python.
The zoo welcomes four Sumatran elephants. Meanwhile, Robert and Terri try to guess the gender of Bindi's baby, but Bindi and Chandler have their own surprise in store.