The last time Burt Mustin appeared as Grampa Jensen, in the 5th season episode The Barber Shop Quartet his last name was spelled Jenson.
(The Hooterville Volunteer Fire Dept Band is practicing in Drucker's General Store)
Uncle Joe: Floyd, let me hear you play that last part again.
(Floyd plays his part on the trumpet, with the last note being way off)
Uncle Joe: Okay, that's good enough.
Sam: But that last note Floyd played was way off.
Uncle Joe: And you're gonna make it better?
(Sam gets a fly swatter, and smacks something on Floyd's music sheet)
Sam: Try it again Floyd.
Floyd: You know, I wondered why that note kept moving around.
Selma Plout: Well, what's all this?
Uncle Joe: Oh, hi Selma. Kate's coming home.
Selma Plout: So I hear. Nobody made this much fuss when I returned from my trip.
Uncle Joe: That's right, we done all our cheering when you left.
Billie Jo, Bobbie Jo and Betty jo sing "Up, Up and Away"
Final regular appearance of Rufe Davis as Floyd Smoot, though he'll make a few guest appearances in season 7.