A bomber is loose on Babylon 5; setting of 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.

Delenn decides it's time to try to contact some of the first ones and enlists the help of Draal, while Babylon 5 is assigned a political officer.

Bester comes to the station to track down a dealer of Dust - an illegal drug that gives normal people temporary telepathic powers. G'Kar is also interested in the drug. He sees it as a potential weapon against the Centauri, but first he has to test it.

An archaeologist arrives at Babylon 5 with a grave massage: a dormant Shadow ship has been found on Ganymede. It must be destroyed before it falls into the hands of President Clark.

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.

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.

Bester comes to Babylon 5, this time seeking help against a common enemy - the Shadows. Meanwhile, G'Kar demands to be included in the War Council.

Ivanova gets a distress call from herself pleading for help as the Shadows destroy Babylon 5. It is dated eight days into the future. At the same time, on Minbar, Sinclair is given a nine-hundred-year-old letter from Valen, telling him that a drastic action must be taken to prevent that future.

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

Garibaldi investigates an area where a maintenance worker disappeared and finds a whole floor that was forgotten after construction, including its rather strange inhabitants. Meanwhile, Delenn is about to take on the role of Ranger One, but Neroon swears to stop her.

With the Shadows next target known, a massive counterattack is prepared. Ivanova and Marcus scout ahead in the White Star, while the fleet stands by in hyperspace. At the same time, Franklin finally has to face his problems as he lies fatally wounded in Downbelow.