Supergirl

1980s action adventure starring Helen Slater as the DC Comics superheroine. The film follows Kryptonian Kara Zor-El aka Supergirl (Slater) as she travels to Earth on a mission to retrieve a life-giving power source to save her home city from total destruction. She traces the lost Omegahedron only to discover that it has fallen into the hands of the rapacious Selena (Faye Dunaway), who unleashes untold horrors to thwart her young adversary.