A young man is accidentally sent thirty years into the past in a time-traveling DeLorean invented by his friend, Dr. Emmett Brown, and must make sure his high-school-age parents unite in order to save his own existence.
A boy obsessed with 50s sci-fi movies about aliens has a recurring dream about a blueprint of some kind, which he draws for his inventor friend. With the help of a third kid, they follow it and build themselves a spaceship. Now what?
Daring British WWI fighter pilot James "Biggles" Bigglesworth and 1980s low-level business executive Jim Ferguson discover that they can time travel to each other's eras. They try to stop the Germans from changing the outcome of WWI.