There were two attempts at Wonder Woman in the 1970s, one with Cathy Lee Crosby and one with Lynda Carter, plus in 1984 the Salkinds spun off a Supergirl movie from the Christopher Reeve franchise. The Great Superhero Movie Rewatch takes a look at all three.
The basic plot of Supergirl is okay, but the details are a mess. Where is Argo City, exactly? How did it survive the destruction of Krypton? How do they know that Kal-El is on Earth, calling himself both Clark Kent and Superman? Why does Kara feel the need to enroll in a school? Even leaving the school aside, what’s the point of the Linda Lee identity? Why does she insist on being nice to Ethan when he’s a creep (even though he’s mostly a creep to her because he’s been magically roofied by Selena)? Why can’t Selena figure out that Linda Lee is Supergirl when she’s using her magic mirror to spy on her constantly, including at least two occasions when she changed from one to the other? How drunk was Peter O’Toole when he was acting in this, anyhow?