Morden is another baddie. The best thing about him is that he is dead.  Don't you just hate it when you do a review of someone and they die in the next episode. He got clobbered soon after a delightful conversation with Vir on Centauri Prime (see the quote below).

If you were to meet Morden in a pub you would say, "What's that awful smell?".

Like Sheridan`s wife Anna, Morden was a member of the crew of the Icarus that travelled to Z'ha'dum. No one survived except Morden (and possibly Anna Sheridan?). Morden was given the choice of serving the Shadows or death. Morden chose to serve and he helped the Shadows win alliances with the Centauri and the Earth Alliance.

Although dead, Mr Morden makes a brief appearance in Season 5 (Day of the Dead) when he gives Lennier some advice and indicates a little of his future.