This one episode contains much of what made The Andy Griffith show great even though it doesn't have appearances by Opie or Aunt Bee. How? Because it has perfect examples of the show's humor (Barney's landlady growing mushrooms in her basement 'for fun and profit') but also more serious moments, such as when Andy meets his old high school flame at their class reunion. They wonder why they ever broke up, but as they discuss old times and current days, they remember that they split up over having different goals and dreams for the future. Meanwhile, Barney was anticipating seeing his old heart throb and hoping she won't make a fool of herself when she sees him. Quite the contrary, she doesn't recognize him, in fact she doesn't even remember him.
The episode ends with Andy and Barney cleaning up after the reunion, and sort of re-capping the evening. Barney says it makes him kind of sad, seeing the people they went to school with, and how they're all getting older. Repeating a phrase that had been written in one of their high school yearbooks, Andy asks Barney, "Do the tears on your pillow bespeak the pain that's in your heart?" Barney kind of chuckles, but wistfully says "Yeah..." and Andy says "Me too." After a moment's pause to reflect, they get back to their clean-up. That's the ending of the episode, and probably one of the finest ones that ever aired.