https://nypost.com/2021/10/25/isis-actr ... ead-at-70/
Joanna's total sincerity in playing the role, despite the cheap production values and scripts aimed at the under-ten set, is why she became iconic in the part, just as Lynda Carter would a year later on "Wonder Woman."
She had some other roles before and after "Isis", and had even made the Guinness Book of Records for her extensive TV commercial appearances in the 70s, but in 1980 she walked away from the business. By the late 90s and early 00s she began appearing often in the Convention circuit again and clearly embraced her reputation as a trailblazer for female superheroines (whose mission wasn't to club us over the head with social agenda propaganda, but to just give us basic lessons in life in the "closing morals" that Isis would always deliver at program's end). Unfortunately when "Isis" was released on DVD, efforts to get her to participate in the bonus content couldn't be worked out.