A talking purple dinosaur leads a group of children on a hunt for a large missing egg.
During World War I, a German U-boat sinks a British ship and takes the survivors on board. After it takes a wrong turn, the submarine takes them to the unknown land of Caprona, where they find dinosaurs and neanderthals.
In 1919, a British expedition in the Antarctica region is searching for a lost American explorer and finds a hidden prehistoric world instead.
Sanna escapes being sacrificed and meets Tara. Together, they live in a seaside tribe that worships the Sun God and survive the dangers of the creatures from the Mesozoic Era.
Follow the friendship between the Nobara family's pet dog Shiro and a "small dinosaur." Their connection helps the growth of Shinnosuke and the Kusakabe Defense Squad.
A time traveling scientist goes back to prehistoric times and feeds dinosaurs a magic cereal that increases their intelligence - next they land in modern New York City for a series of comic adventures.
