Time-stamp time! According to G'Kar, this episode starts 2 weeks after S3E6 "Dust to Dust", and in 6 weeks G'Kar will be released from his 8-week G'Karceration. I don't know where that puts it in relation to the beginning of 2260 however.
After Corwin's plot last episode, here is the continuation of Zack's similar loyalty plot. The two are interesting to compare. On a side note, do I remember correctly that Mr. Nightwatch listed EMAILS as one of the forms of communication they're allowed to monitor? If email is still in use in 2260, carried by some interstellar communication network, I will geek out indeed :-D
The line is dropped that it's a 2-day hyperspace jump to get to Earth space. I'd pay attention to this to see if the show sticks to the rule in the future.
Warning: Spoiler!In fact, I'm paying attention to this because on my first watching of season 4 I distinctly remember Franklin getting back to Babylon 5 from Earth space way too quickly in one episode.
I like seeing Sheridan in civies for once, not only because he dresses pretty cool, but also because this symbolizes the fact that they are taking the White Star into Earth space to directly oppose the interests of the Earth Alliance.
I've read some internet discussion trying to estimate the thrust capabilities of the ships involved in this episode by the distance covered between the moon Ganymede and Jupiter's atmosphere in a matter of seconds. While I appreciate this type of speculation, it reminds me that I assume there is always some sort of time-lapse in every scene of a TV show. This accounts for some time-frames that don't match up or flashbacks that seem slower or faster in the memory of a character. Given that Sheridan was gone for 4 days according to that Night Watch guy, the chase scene to Jupiter has room to have taken a couple of hours perhaps, making the ships a little less ridiculously fast. I wonder if the scene could plausibly be considered in this way.
This episode gives the viewers our first clue about the operation of the Shadow vessels: they are piloted by beings, and I think it was specifically human beings. I'm not sure if I remember that correctly from the episode though.
Warning: Spoiler!We later find out that the Shadows want telepaths to pilot their vessels, and in fact telepaths are their greatest weakness, and this is why the Narn have no telepaths, which is something we heard about in the very first episode, and OH MY GOODNESS the continuity in Babylon 5 is amazing!