This is a scene from the Wonder Woman television show where Lynda Carter is sharing the screen with Leif Garrett's younger sister, Dawn Lyn. Leif Garrett was a child actor and musician. Sounds like he used his power in Hollywood to get his sister a nice little role alongside Lynda Carter. At the time, Lynda Carter was one of the biggest stars in the world. How could you be Wonder Woman and not be one of the world's biggest stars?
Lynda Carter is still a Wonder Woman in many ways. She is an LGBT right advocate and is passionately looking into ways to find a cure for cancer. I'm sure she's not looking into any microscopes to do it, but just having her name attached to such a cause is enough to propel it forward.