A teenager struggling with loss named Hiro is aided by his brother's healthcare robot. The duo teams up with a bunch of others to stop a villain from misusing Hiro's inventions.
Some time after the war, Snuf, Tom, Mirjam and Brandenburg are dead-set on solving a case involving a supposed "flying phantom" haunting the local swamps and causing mayhem.
Jake Sully and his family become hunted by the Sky People years after the events of the first movie. To stay safe, they join a clan of sea-Na'vi where his children have trouble fitting in, all the while the Sky People are still tracking them down.
The mane five celebrate their first Winter Wish holiday together, however they soon find that they each have slightly different plans and traditions regarding the holiday. They set up a schedule to be able to participate in everyone's own traditions just in time. Meanwhile, the winter snow turns to out to be more intense than initially anticipated.
During World War II in the Netherlands, a teenage boy lost both his parents in the war and is determined to fight the Nazis to get revenge. He hopes to train his German shepherd, Snuf, in order to fight them. However, things get only more complicated when he helps hide a Jewish girl and a gunner from the English army on his uncle's farm.
The dragon riders explore a new realm, the Ice Realm, while Tom tries to figure out his ancient puzzle box and Thunder still longs to find his Night Light family.