Sheridan encounters a Shadow vessel. Londo tries to end his alliance with the Shadows.

A series of bombings on Babylon 5 triggers an extensive investigation involving some new residents.

Narn officials arrive to replace G'Kar. An alien ship threatens the station with a deadly intelligence test.

Lyta Alexander returns — as Kosh's aide. A monk on board the station experiences terrifying visions.

There's a new, powerful ally in the fight against the Shadows. Sheridan's recent actions are questioned on Earth. Some shocking information about Earth's President Clark is revealed.

A Psi-Cop investigates a powerful illegal drug on Babylon 5, but Sheridan distrusts his motives. G'Kar makes startling discoveries about Londo.

Marcus and Franklin investigate a series of deaths caused by a mysterious parasite. Shadow vessels amass near Centauri space. Marcus confesses a fondness for Ivanova.

Sheridan discovers a terrifying new alliance between the Shadows and another race.

Sheridan clashes with Nightwatch when martial law is imposed on Babylon 5. A prophet reveals Londo's surprising future.

Earthforce sends destroyers to seize control of Babylon 5, but Sheridan rallies the crew to fight back. As the Shadows gain allies, Earth's colonies defy martial law.

When Babylon 5 officially declares independence, Nightwatch terrorists kidnap Delenn. Londo acts against Centauri aggression.

Vir causes controversy by aiding the Narn without authorization. He also meets his fiancée — for the first time. Sheridan shares a romantic dinner with Delenn.

Sheridan urges the planetary leaders to ratify the peace-keeping Babylon Treaty. A mysterious traveler claims to be the legendary King Arthur.

Sheridan forms an uneasy alliance with a former nemesis. As free speech is curtailed on Earth, the Shadows continue to expand their conquest.

The Shadows punish Londo. Franklin's drug dependence affects his job performance. The death of an ally mars Sheridan's momentary victory over the Shadows.

Sinclair returns to accompany Sheridan on a life-threatening mission involving Babylon 4.

Sheridan moves through time, experiencing his future. Sinclair leads the effort to transport Babylon 4 back in time to the first battle with the Shadows.

Sheridan uses a powerful new tool against the Shadows. Franklin undertakes a strange mission.

Delenn agrees to lead the Rangers, but Marcus must protect her from a deadly threat. Garibaldi investigates a secret station level.

Londo uses G'Kar and Vir in a deadly scheme to gain power in the Centauri Royal Court. Sheridan deciphers a key Shadow strategy.

The Shadows launch a major offensive. Franklin finds a spiritual resolution. Sheridan receives a surprise visitor (MELISSA GILBERT).

Londo's political status changes. The history and motives of the Shadows are revealed.