Sheridan's wife, Anna, who supposedly died four years ago, arrives on the station and tries to convince Sheridan to come to Z'ha'dum to meet his opposite number. Elsewhere, Londo receives important news about his political future, and the Shadows move against Babylon 5 directly.

With the Shadows next target known, a massive counterattack is prepared by the various alien races on Babylon 5. At the same time, Franklin finally has to face his problems as he lies fatally wounded in Downbelow.

A delegation of religious leaders comes to Babylon 5 to visit Brother Theo and to bring news of events on Earth. Meanwhile, Sheridan and Delenn try to figure out where the Shadows will strike next, and Londo sets a plan in motion to finally rid himself of Lord Refa.

Garibaldi investigates a mysterious area in Grey Sector, nicknamed by maintenance as the B5 Triangle, when a maintenance worker disappears without a trace. Meanwhile, Delenn prepares to take on the role of Ranger One, when Neroon arrives on the station and questions her worthiness to lead.

When the new Vorlon ambassador arrives, Sheridan decides it's time to test just how effective telepaths are against Shadow ships. Elsewhere, Franklin is still on walkabout in Downbelow and falls in love with a singer.

Bester returns to Babylon 5, this time seeking an alliance against a common enemy - the Shadows. Meanwhile, G'Kar demands to be included in the Conspiracy of Light.

While Sheridan is unstuck in time, experiencing a future where Centauri Prime is in ruins, the others continue with their plan to take Babylon 4 back in time.

When Ivanova receives a distress call from herself pleading for help as the Shadows destroy Babylon 5, the crew are stunned to discover it is dated eight days into the future. At the same time, on Minbar, Sinclair receives a nine-hundred-year-old letter from Valen, prompting Delenn to reveal a long kept secret.

Morden returns to Babylon 5 with plans to secure Londo's cooperation again, and Kosh gives Sheridan a victory against the Shadows, who have begun attacking openly - but that help comes with price. Meanwhile, Dr. Franklin's stims addiction comes to a head after a confrontation with Garibaldi.

A mysterious man comes to Babylon 5 dressed in chainmail and armed with a sword. His name? King Arthur, son of Uther Pendragon, come to help when he is needed most. Meanwhile, Sheridan and Ivanova try to gain recognition of the station's independent status among the alien governments.

Vir returns to Babylon 5 to find that he now has a wife and that two Narns are out for his blood. Meanwhile, Ivanova investigates the activities of the mysterious Centauri, Abrahamo Linconi.

As Delenn prepares for a Minbari ceremony of rebirth, the remains of the Nightwatch on the station plan to strike at Sheridan through Delenn. Meanwhile, Babylon 5's computer goes through an interesting change, and Londo "encourages" Refa to stop associating with the Shadows.

Faced with the threat of an imminent attack from Earthforce ships loyal to President Clark, Sheridan makes the fateful decision to declare Babylon 5's secession from the Earth Alliance. Meanwhile, Delenn is forced to return to Minbar when the Grey Council refuses to act upon increased Shadow activity.

When President Clark declares martial law throughout the Earth Alliance, Nightwatch prepares to take control of Babylon 5 by any means necessary, forcing Zack to decide whose side he's on. In an exercise of bad timing, the prophetic widow of Emperor Turhan visits the station, granting Londo the audience he's been requesting since Turhan died.

A startling revelation from an archaeologist on the run from President Clark leads Sheridan and Delenn on a dangerous mission into Earth Alliance space. Meanwhile, Nightwatch increases their surveillance operations on Babylon 5, putting Zack Allen in an uncomfortable position.

Marcus starts snooping around Downbelow when some of his contacts start behaving unusually and a lurker is found dead with a strange creature bonded to his spine. Meanwhile, when David Corwin receives a promotion, Ivanova investigates his loyalties and suitability for the Conspiracy of Light.

Bester visits the station to track down a dealer of Dust - an illegal drug that gives normal people temporary telepathic powers. Seeing it as a potential weapon against the Centauri, G'Kar tests the drug on himself, with unexpected consequences. Meanwhile, Vir returns to Babylon 5 after his first diplomatic mission to Minbar.

With the help of Draal, Ivanova and Marcus go searching for the First Ones. On the station, Sheridan comes under the scrutiny of the Nightwatch as well as Babylon 5's new political officer, and G'Kar questions Delenn about the Rangers.

One of the monks now living aboard B5 starts having disturbing visions and realizes that his past may not be how he remembers it. Meanwhile, Lyta Alexander causes a bit of commotion when she returns from the Vorlon homeworld.

The new Centauri appointed Narn government send a replacement for G'Kar, who has to decide whether to return to Narn as demanded by the Centauri, or remain on Babylon 5. Meanwhile, an alien probe threatens to destroy the station unless it gets the answers to a series of complicated scientific questions.

A bomber is loose on Babylon 5; setting off bombs with seemingly no pattern. G'Kar blames the Centauri, Londo blames the Narn - and in it all, Lennier is critically injured. At the same time a group of monks request permission to live on the station.

An Earthforce Special Intelligence investigator comes to B5 with Lt. Keffer's last recording, asking the ambassadors if they recognize the ship in it. Meanwhile, Londo takes steps to remove himself from the Shadows, and Sheridan is presented with a new weapon with which to fight the growing Shadow threat.