I've read a lot of the comments, and I see an overwhelming trend here: people don't know what they're talking about. Crusade is NOT a bad show. It is an excellent show, and a worthy addition to the B5 universe. It was originally scheduled to air after the movie "A Call To Arms", and the pilot episode was to be "Racing The Night". They had 5 episodes ready and were about to film more when TNT paused production. They wanted serious changes to the show: new uniforms, more violence, more sex. They forced JMS to write a new pilot, "War Zone" with ridiculous requirements, such as a fistfight in the opening.
He later refused to add more sex and a 'sexual explorer', so TNT canceled the show after 13 episodes were filmed. The show was canceled before it even aired. It was not canceled because it was bad, but because TNT made it bad. They did eventually air it, but totally out of order. If you ignore "War Zone" and watch the other 12, it's a great show. The show clearly has an arc, and it was about to begin when the show was canceled. Hopefully the SCI-FI channel will pick it up in the future and continue this great series.