This is an OK standalone (ish) episode. The probe plot is a bit "meh", but there's excellent stuff elsewhere in this episode.
The Narn and Centauri scenes are great. That scene with Londo and Na'Far... Whoa. Really excellent. And Vir, of course, looking extremely uncomfortable in the background.
I like Vir being sent off to Minbar, and the scenes between Londo and Delenn preceding that event. Watching the complexities of the Londo character is always an enjoyable thing.
It's nice to see Ta'Lon again. As I recall, the first time I watched this episode, I didn't realize that WAS Ta'Lon standing behind Na'Far, until the scene where he meets Sheridan at the bar. Clearly I am very perceptive ...
Na'Far is quite an interesting character, too. The whole Narn situation and the differences of opinion on how to deal with the occupation is interesting. I do wonder where all the women are. There don't seem to be any in this episode. There were one or two in that scene where they get a message from Narn in "Comes the Inquisitor". But, for the most part, we only see male "background" Narns on Babylon 5. What's the deal with that?
I hadn't really considered the similarities with the Klingons, but yes, I suppose there is some of that on display here.
Dr. Franklin and his stim habit .. I find it believable. Also Dr. Franklin being a "ladies' man" again... a recurring theme, for sure.
I kind of enjoy the chaotic trade negotiation scenes, although I'm not a big fan of that scene with the thuggish guy with the giant clawhammer thing. The dialog is believable enough .. You know there WOULD be a guy saying something just like that. Maybe it's the acting that puts me off. The "thugs" on Babylon 5 are always somewhat cartoonish.