When the Narn attack a Centauri colony, Londo and G'Kar nearly come to blows. Meanwhile, raiders are attacking transport ships near the station.

A racist group is terrorizing non-humans on Babylon 5. Meanwhile Londo has trouble with two young Centauri who want to break with tradition by ignoring their arranged marriages, and instead marry for love.

There is an explosion in one of the fighter bays just days before the president is to visit Babylon 5. A dying man implicates Garibaldi, which is just what the head of presidential security wants to hear, as she blames him for her father's death.

The Centauri are about to withdraw from a quadrant of space because the Narn are harassing them, when Londo gets an offer to take care of the problem. Meanwhile, Garibaldi tries to find out what his informant stumbled upon that got him killed.

Babylon 5 gets considerable space problems when 25,000 Earth Force soldiers arrive. Led by General Richard Franklin, Stephen Franklin's father, they are to use Babylon 5 as a staging point for a risky military operation.

A 100% fatal and 100% contagious plague is killing the Markabs. Dr. Franklin tries to find a cure, but is being opposed by the Markabs themselves, who believe the plague only affects the immoral.

Clark has just declared martial law, and while Nightwatch prepare to take control of the station, Zack has to decide whose side he's on. In an exercise of bad timing, the prophetic widow of emperor Turhan finally comes to the station, granting Londo the visit he's been begging her for, for a long time.

The renegade destroyer "Alexander" arrives at Babylon 5 and Sheridan is forced to announce the station's secession from the Earth Alliance, and prepare for an attack by Clark's forces. Meanwhile, Delenn is forced to go to Minbar when the Grey Council refuses to act upon increased Shadow activity.

The only obstacle remaining between Sheridan and Earth is a fleet near Mars. With the help of the resistance, Sheridan plans to smuggle Shadow modified telepaths onto the fleet, hopefully disabling it long enough for him to take Earth. Meanwhile, Marcus is determined to find a way to help Ivanova.

Clark is dead and the civil war over, but several issues are unresolved. Ivanova is grief-struck at Marcus death and Lise is missing, and Sheridan must now face the consequences of his actions. He did the right thing - but in the inconvenient way.

It is near the end of 2262, and many changes are abound. Londo, G'Kar and Garibaldi have already left, and Franklin will be taking up his new position on Earth shortly. Finally, Sheridan and Delenn leave for Minbar, where the Alliance's recently finished headquarters are located.