Supergirl

A survivor of the explosion of the planet Krypton, the city of Argo drifts through space, its inhabitants living happily under a protective dome. Among many others, Zor-El and Alura live there with their teenage daughter Kara. Kara is very close to the respected but reckless scientist Zaltar, and during one of his experiments the city's protective dome is damaged, and the small sphere that serves as their energy source, the omegaedron, escapes through the hole. Zaltar knows he has earned himself a sentence to the Phantom Zone, and Kara sets off in a hyperspace ship that takes her directly in search of the omegaedron, which has landed on Earth. If she wants the city of Argo, her family and friends to survive, she must find it, because without that energy source the city is doomed to die in a short time.