Anna has finally finished the age calibrator, so now Tanja can return to Planet 9, and Mie, Johannes and Mette can return home to Earth. But when Viggo V discovers that there is an alien on Earth, he lays out a new and sinister plan involving Tanja. Mie and Johannes are in doubt whether they will like each other as 12-year-olds and are considering staying 19. At the same time, Anna is involved in Viggo V's new plans for Planet 9.
—DR