Found it!
It's Chrysalis (4) from the first Babylon 5 soundtrack.
https://www.amazon.com/Babylon-Compilation-TV-Christopher-Franke/dp/B000002VUZ
It's track four. (The tracks are organized by names that come from the show's episodes, but they are not music limited to those episodes: Chrysalis, Mind War, Parliament of Dreams and The Geometry of Shadows.)
I'm partial to the season 1 theme and music. Everything was still a mystery then. This is my most listened to soundtrack from the show:
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https://www.amazon.com/Babylon-Compilation-TV-Christopher-Franke/dp/B000002VUZ