This must be the episode you are talking about:
http://babylon5.wikia.com/wiki/End_of_the_Line
Poor Bill Lumburg, er I mean Captain Gideon.
Crusade felt more like a continuation of Babylon 5, just minus the original cast, than a spin off. We never did see what happened to the Shadow technology once Sheridan liberated Earth, and would have been interesting to follow that up. Also, I think they could have covered the events of the Telepath War. If I recall correctly, in one of the first Crusade episodes, I think there was a throw away line about new telepath rules and a telepath conflict. Would have been a great way for Lita Alexander, Bester, and maybe even Lennier to appear. I remember reading once that JMS was asked what happened to Lennier and Lita, and he said it was a sad story he would have to tell sometime, and implied it had to do with a battle at the Psi Corps headquarters.
http://babylon5.wikia.com/wiki/End_of_the_Line
Poor Bill Lumburg, er I mean Captain Gideon.

Crusade felt more like a continuation of Babylon 5, just minus the original cast, than a spin off. We never did see what happened to the Shadow technology once Sheridan liberated Earth, and would have been interesting to follow that up. Also, I think they could have covered the events of the Telepath War. If I recall correctly, in one of the first Crusade episodes, I think there was a throw away line about new telepath rules and a telepath conflict. Would have been a great way for Lita Alexander, Bester, and maybe even Lennier to appear. I remember reading once that JMS was asked what happened to Lennier and Lita, and he said it was a sad story he would have to tell sometime, and implied it had to do with a battle at the Psi Corps headquarters.