I was equally surprised to learn that one of my favorite sad endings (from "A Private Little War") was some of that interesting library stuff.
the one I've been trying to remember. I've been talking earlier in this thread about this mysterious sad cue that some episode ended with, but I thought it was a third-season episode. Which cue is it? Looking over the S2 library titles, I'd guess "Captain Playoff No. 3 (Sad and Alone)."