Sam is in his beach-side 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. Everyone escapes but some members of the group are injured.
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. They meet up with their friend Emma, another participant.
In the Peruvian jungle, Sam, Rikki and Harry are tagging along with Kingston and local ranger Miguel, who's attempting to trap a dangerous rouge jaguar.
Sam and Nathan are on a guided tour with Nathan's friend Raj to see the elusive and endangered Bengal tiger in a remote reserve. They cross a rope suspension bridge and find some tiger footprints on the track.
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 and April visit a dormant volcano in Borneo with Mayang, an old childhood friend of Sam's. Sam and Mayang race to the top, but on the way, Mayang falls and injures himself.
Ju Sam and Josie go to Kenya to search for the mythical Jumbo Jumbo flower with Uncle Shau, which they hope to find and study as a part of a school project.
The Fox family and Rikki are camping in the Egyptian desert with Emma. During a camel ride, a sandstorm separates Emma from the group, and Sam goes after her. Sam finds Emma but now they have both lost their camels.
In the bayou of Louisiana, Sam and Rikki go fishing with a family friend, Rene. As Rene guides them through the swamp, he warns them about the Loup Garou (werewolves with glowing red eyes).
On cultural exchange in India for the Holi Festival of Colours, Sam, Rikki and Emma are learning to dance Bollywood style for tomorrow's big performance with the help of Indian student Nisha.
Sam, Rikki and Josie are on a paddle boarding trip to the Great Australian Bight with Nathan, who's scouting new dive sites. Rikki panics when he sees a fin cut through the water and assumes it's a great white shark.
On a mountain biking trip with Josie and Rikki in Tasmania, Sam accidentally rides off a cliff and lands on a ledge, and his bike crashes to the bottom of a gully.
Sam, Rikki, Emma and Laura are trekking in Norway to see the spectacular Northern Lights. After Sam and Rikki go back to the cabin to get Rikki's herrings, they get stuck in a windy storm.
Sam, Josie and Nathan are in the Mexican desert to check out caves for Nathan's adventure tour company when an earthquake occurs and Nathan suffers a suspected rattlesnake bite.
In the jungle of Thailand, Sam and Rikki chase after a group of Langur monkeys after they steal Rikki's phone. When they find them, the monkeys pelt the boys with coconuts and durian, then steal Sam's wristcam.
Sam and Rikki are in Alaska for a wilderness adventure, led by their Native Alaskan guide, Jacob. On the way to the ice-fishing hut, a half-dog, half-wolf hybrid confronts them.
Sam, Nathan and Rikki are hiking in a Pacific Northwest state pine forest when they come across Parker - an injured man who Sam thinks has fallen off his horse, the name of which Parker keeps repeating: Black Prince.
In South Australia for work experience, on a large sheep farm, Sam, Rikki, Josie and Emma are put in charge of the overnight sheep muster - if they lose one sheep, they fail.
