Supergirl is Kara, Superman’s cousin, who journeys from her home on the planet of Argo to Earth to recover the missing Omegahedron Stone, life-force of her world, which has fallen into the clutches of the evil Selena (Fay Dunaway), a power-hungry sorceress.
Landing near an exclusive boarding school for young ladies, Kara quickly adopts the name of Linda Lee and finds herself rooming with Lois Lane’s kid sister, Lucy (Maureen Teefy).
Rest of pic represents a struggle between the good of Supergirl and the evil of Selena with, as is usually the case, evil being a lot more fun.
Dunaway has a ball as Selena, and her joyably over-the-top handling of the part could merit cult attention. She’s ably backed by Brenda Vaccaro as her incredulous assistant, and Peter Cook as her sometime lover and math teacher at the girls’ school.
Peter O’Toole makes a modest impression as Supergirl’s friend and mentor, while Mia Farrow and Simon Ward, as her parents, have even smaller roles than Susannah York and Marlon Brando in the first Superman.
Helen Slater is a find: blonde as Supergirl, dark-haired as Linda Lee, she’s an appealing young heroine in either guise. Screenplay is filled with witty lines and enjoyable characters, but Jeannot Szwarc’s direction is rather flat.