Sam is in his beachside hometown when a visiting pop star, Holly, decides to take a swim – during box jellyfish season – and appears to be in distress.

Sam and Rikki are on a trip to the Rocky Mountains with Harry and Jordan’s scout troupe and his mum, Laura, when their bus crashes down a canyon.

Sam and Rikki fly into a remote airstrip in Tanzania, on their way to give a presentation on the Tasmanian Devil at a Wildlife Youth League conference.

Sam, Rikki and Nathan go caving in the Australian outback and come across a bed of scorpions in an underground cave.

Sam takes Harry out zip-lining on Nathan’s new Flying Fox to practice their skills ahead of their upcoming trip to New Zealand.

Sam and Rikki are in the Amazon on a rare-orchid hunt with Brazilian orchid expert, Claudio.