It seems that every week this year brings word of the passing of yet another great television star of yesterday or not that long ago. Joe Garagiola. Ken Howard. Garry Shandling. Pat Harrington Jr. Dan Haggerty. Abe Vigoda. “The Waltons” creator Earl Hamner Jr. And now Patty Duke. I’ve enjoyed the work of all of these people and I’m sorry to see them leave us. But the loss of Ms. Duke at a still-vital 69 makes me especially sad, likely because I am old enough to remember watching and enjoying her ground-breaking sitcom “The Patty Duke Show” in first-run and perpetual syndication throughout my childhood.