"Kamikaze Bingo" was the episode's official title, I believe.
Mark my words - history will record this as one of the greatest episodes of televison comedy ever. Bar none. So many disparate threads, each experty developed independently, and then, at the very last possible second, BAM!!!, they all come together in a collision (literally!) of cosmic inevitability. I laughed out loud harder than I have in years the first time I saw it, and still have the same reaction upon re-viewings. It's one of those rare moments where laughter is a true reflex, not an act of social signifying.
Genius and craftsmanship of the highest level (and in every regard) at every step of the way are the trademarks of this show, and, imo, they reached an apex in this episode. It just don't get any better.