Barney and Gemma meet the sports stars of the sea - sprinters, jumpers and even gymnasts!
Barney and Gemma show that coral reefs are like our cities - and everyone has a job to do.
Julia explores the red centre of Australia and discovers a land of surprises. At Alice Springs, Julia is roped into The Henley on Todd Regatta, an annual dry river boat race. She gets roped into the race joining the underdogs - The Pirate Team - to see if she can turn their losing streak around.
Patagonia invites you into a rarely seen South American wilderness, home to surprising creatures who survive in environments that range from the mighty Andes Mountains to Cape Horn.
Julia explores Australia's Northern Territory, including the tropical wetlands of the top end. She takes a scenic helicopter flight into the flood plains around the Mary River, where she sets off on a crocodile safari with wildlife ranger Chase Johnson.