Well, after Babylon 5 was over, there was a new spin off series created called Babylon 5: Crusade
. I was recently able to see all of the 13 episodes of the series. The series did have a rough beginning, but the series did get progressively better up until the time it was canned.

The series follows a prototype ship of human-vorlon-mimbari engineering that treks through the galaxy to find a cure for earth's plague unleashed by the Drakh at the end of the Babylon 5 series. It does have some good casting, and the story line isn't bad if you like the star trek type of story line. I liked the character of Captain Gideon, and the character of his first officer, a telepath, played by Daniel Dae Kim.

So what killed the show?

Well that's simple.
1. This show, just like Babylon 5, had some pretty bad writing. When I say bad, I mean really bad. JMS (the writer) needed to have someone proofread and edit his work because it was cheezy, corny, and highly unlikely.
2. It aired on TNT. This type of show should have been on the SciFi channel.

If you happen to see if in your local library, or on netflix, give it a go. Be forewarned of the bad dialogue!

Wikipedia entry
IMDB entry