Would this TV show qualify as lost media?

Awhile back, I was looking at some obscure TV shows on YouTube &, in the process, I came across this episode of an early 1980’s PBS sitcom called “The Righteous Apples”. I tried looking for more episodes of the show online, but so far that episode is the only one available. IMDb says that the show ran for 2 seasons (1980-81), however it seems that the episode listing, especially for season 2, is incomplete. This show did have some well-known regulars (Mykelti Williamson & Elizabeth “E.G.” Daly) & guest stars (Rene Auberjonois & Kim Fields). The 1 episode that is available on YouTube is Season 1, Episode 3, “Point of View”. All of the other episodes appear to be lost. One of the producers on the show (Topper Carew) later created & produced the 1990's show "Martin" & now works as a Visiting Researcher/Scholar at the MIT Media Lab.