Crikey! It's the Irwins Season 4

History is made at the Australia Zoo when Robert and team attempt the largest alligator capture and relocation; koala breeding takes a tough turn for Bindi and the Wildlife Hospital; Terri gives the Sumatran elephants more space to roam.

Robert handles an aggressive wombat called Bunker, and it's moving day for a giant anaconda called Nikki; Terri helps treat hundreds of lorikeets injured by a hailstorm; Later, Robert and Chandler team up to bake a special treat for the Irwin ladies.

Terri responds to the call when Daniel, a very special wallaby, becomes severely injured and cannot walk; Robert and Chandler catch some waves before taking a road trip to pick up a new Komodo dragon; Bindi checks in on Tallbert the giraffe calf.

Chandler must handle a koala crisis, while Terri lends a hand to care for an influx of puggles; A turtle called Billy undergoes a critical surgery, and Bindi recruits Chandler and Robert to bake a special wombat birthday surprise.

Bindi welcomes the arrival of tiny poison dart frogs to their new home at the zoo; Terri takes charge when the crew moves Bosco out of the Crocoseum; Chandler helps a glider called Kronk.

Robert races to safety when a croc called Casper attacks during a feed; Tragedy strikes after urgent repairs begin on the Rainforest Aviary, and Bindi hand-raises a possum joey called Bonnie; Later, baby Grace receives a surprise honor.

Robert Irwin comes face to face with a great white shark for the first time ever. Following his father's footsteps, he will get as close as possible to these incredible creatures to determine which apex predator reigns supreme – crocs or great whites?