Riley helps save a pod of dolphins, with assistance from a marine biologist, when the animals become trapped in a lagoon on the South Pacific island of Moorea.
Riley travels to northern Canada where he and his aunt, uncle, and cousin study the polar bears that are wandering through towns while waiting for the Hudson Bay to freeze over again.
Riley accompanies Uncle Max, Aunt Martha, and Cousin Alice to Antarctica, the coldest place on earth, to investigate the diet of the penguins there to see whether it has changed because of rising ocean temperatures.
Riley, Uncle Max, Aunt Martha, and Cousin Alice meet in northern Canada, where they study and help polar bears that are wandering through towns while waiting for Hudson Bay to freeze over again so that they can hunt for seals.
Riley and his family visit Australia's Great Barrier Reef to find out why large portions of the reef are dying, facing giant starfish, great white sharks, and poachers along with Wyland, a world-renowned marine artist and conservationist.
Riley travels to northern Canada where he and his aunt, uncle, and cousin study the polar bears that are wandering through towns while waiting for the Hudson Bay to freeze over again.
