Robert feeds the zoo's most notorious crocodile by himself.

It's a big day for Hunter the Sumatran Tiger. He is blind and must be sedated for his annual eye check, allowing Terri to get closer than usual. The keepers prepare the young giraffe Scarlett for a road trip to South Australia, reuniting her with family.

The family prepares Croc One, Steve Irwin's research ship, for a mission to release an endangered sea turtle back to the wild. Scarlett the Giraffe is reunited with her grandmother, and Grub the wild Echidna is released from the Zoo's Wildlife Hospital.

Robert follows in Steve's steps wrangling Utah, a highly venomous 12-foot King Cobra. Dr. Amber visits Tandora to care for wild koalas. Back at the Zoo, an old injury flares up for Bruce the Brolga, a bird who's been in the Irwin's care for 26 years.

The Australia Zoo's Alligator Snapping Turtles need a health check, and it's Robert's job to protect from their fierce bites. Terri and Bindi welcome seven new lemurs from the US. The Zoo's Rescue Unit is called to save possums caught in a chimney.

Following Steve's dream of global conservation, the Irwins travel to South Africa. Terri helps release a wild leopard, Bindi learns from the all-female anti-poaching squad The Black Mambas, and Robert attempts to photograph Africa's "Big Five."