The 1984 superhero film Supergirl offers a unique expansion of the Superman universe, focusing on Kara Zor-El (Helen Slater), Superman's cousin who arrives on Earth to retrieve a powerful orb from her home planet of Argo City. When the orb falls into the wrong hands, Kara must navigate her newfound powers while confronting the wicked witch Selena (Faye Dunaway), who plans to use the orb's power for her own dark purposes.

Helen Slater delivers a charming performance as the titular heroine, bringing a fresh innocence to the superhero genre that contrasts with her cousin's more established presence. Faye Dunaway's over-the-top portrayal of the villainous Selena provides entertaining camp value, while supporting performances from Peter O'Toole as Zaltar and Mia Farrow as Alura add depth to the Kryptonian mythology. Director Jeannot Szwarc balances superhero action with coming-of-age elements as Kara adapts to Earth while hiding her identity as Linda Lee.

While the film received mixed reviews upon release and holds a modest 4.4 IMDb rating, Supergirl has developed a cult following among superhero enthusiasts and 1980s cinema fans. The practical effects and costume design capture the era's aesthetic, and the film's exploration of female superheroism was pioneering for its time. Viewers should watch Supergirl for its nostalgic charm, unique place in superhero cinema history, and as an interesting companion piece to the Christopher Reeve Superman films. The movie's blend of fantasy, sci-fi, and romance elements creates an entertaining adventure that remains accessible for family viewing.