Given the recent discussions of Planetary Romance, it is natural to recommend the 1979 Buck Roger's television show starring Gil Gerard. The TV series falls somewhere between Space Opera and Planetary Romance. I'll leave it for you to decide exactly where. Many of the plots in Buck Rogers are similar to PR stories, but the emphasis on space fighter battles makes a good case for Space Opera. Regardless, the show's first season had a two part storyline entitled "Planet of the Slave Girls." The episodes aired back to back, if Hulu's airing dates are to be trusted, on September 27, 1979 and Buster Crabbe (the original Buck Rogers and Flash Gordon) made a cameo appearance.
And no one would argue that Buster Crabbe, who played both Flash Gordon (a Planetary Romance classic) and Tarzan (a character created by the father of the field) doesn't belong in a discussion of the genre.