I'm betting that Londo is 3-4 episodes away at most from becoming puppet Londo. I was really hoping that would happen off screen, after season 5, but it looks like it won't. I'll probably have to watch atleast an episode or two with my favorite character just being a puppet. Thats going to suck, but besides that I'm interested in seeing what happens next. this was a good episode.
The build-up and pay-off of that storyline is some of the most powerful stuff in the show.