An old acquaintance requests Londo's help. Sheridan is plagued by visions nobody else can see.
Dr. Franklin examines Sheridan and tells him that there is nothing physically wrong with him, except for the common effects of a sudden fright. He also explains that the body's movements were due to gas buildups inside the body. Sheridan asks what killed the Markab, and Franklin hypothesizes head trauma, but will not know for certain without an autopsy. Garibaldi finds the Markab's identicard and identifies him. Sheridan tries to explain how they should proceed next, but his vision becomes very distorted. Sheridan tells Garibaldi that he feels dizzy, and Garibaldi recommends that Sheridan rest and hear a report later.
Londo begins preparing drinks, and Vir asks about Urza. Londo explains that they had been friends since childhood, though their families had been allied almost since the beginning of the Republic. Londo begins reminiscing about his youth, even though Vir doesn't understand why Londo's ties to the past are so strong. Urza enters, and Londo greets him. They drink together.
Sheridan enters C&C as a jump gate comes online and a ship comes through. While looking at a control panel, Sheridan begins seeing strange patterns again. He tries to clear his eyes, but when he looks out the viewport, he sees the Icarus, his wife's ship, appear and then explode. Sheridan orders the area outside scanned, but no one else has seen anything. Ivanova asks if anything is wrong, and Sheridan says that he has to see to something.
Sheridan explains what just happened to Dr. Franklin, who tells him that there is nothing physically wrong with him, but that there may be a new virus that can't be detected. He offers to put Sheridan in touch with a Markab doctor who may be able to help him, but suggests that his hallucinations are more likely stress-related. Dr. Franklin puts Sheridan on medical leave, and, despite Sheridan's protests, Franklin orders him to relax and enjoy himself.
Londo finally makes contact with Refa. Londo asks Refa if what he heard about Urza was true, and Refa says it is. Londo offers to vouch for Urza personally, but Refa won't go along, despite Londo's claims of being Urza's friend. Refa says he cannot stop the resolution, because it has already gone through. Refa says that Urza's house is already crumbling, and anyone that tries to help will go along with it. Londo becomes outraged at Refa's impudence, claiming that Refa's plans would have been no use without his help. Refa says there is little he can do, but promises he will try. Londo tells Vir to get him a drink, and then communicate with his contacts on Centauri Prime, as he will need more help.
Sheridan is back on the baseball field practicing when Garibaldi enters. Sheridan asks if they found out anything else about the Markab, and Garibaldi tells him that the Markab passed through sector 14 on his voyage here. Sheridan says he thought that sector was restricted, and Garibaldi explains it is, ever since the incident the previous year when Babylon 4 returned. Garibaldi explains that it was kept out of the station logs because EarthForce wanted to perform their own investigation. Garibaldi explains what happened to Sheridan, saying that, even though the station is gone, an anonmaly is still believed to remain. Garibaldi presents Sheridan with a copy of the information, made before it was turned over to EarthForce, and leaves Sheridan to his batting practice.
Londo and Vir enter the exquisitely decorated and catered banquet, where they meet up with Urza. The three of them sit down at a table, and Urza toasts to their friendship and to the Republic. Londo comments on the calibre of the guests at the party, and Urza tells him that, with Londo's help, they will spread the word. Londo tells him that this isn't necessary, since he helped, but Urza says that the resolution was already presented, and will almost certainly pass. Londo begins saying that Refa promised to help, but this angers Urza, who says that Refa is responsible for the resolution in the first place, and wants him out of the way because of how much he knows. Urza seems insulted that Londo would help Refa, but Londo says that he has a destiny to fulfill, and only if he does, will the Centauri return to their rightful place in the galaxy. Urza says he doesn't want to return to that kind of glory, and Londo offers to help, but Urza tells him that the way they are proceeding will never do any good.
Vir tries to talk Londo out of the duel, but Londo will not hear of it, saying that to deny the challenge would be disgraceful.
Garibaldi receives a communication from Dr. Franklin, who asks him where the captain is. A device Franklin gave Sheridan to measure his stress monitored a strange neural surge just a few minutes earlier, which caused the link to go dead, and Sheridan would not answer communication requests. Garibaldi calls his security officers, telling them to look out for the captain.
At C&C, a Starfury is detected to be about ready to launch from the station, and the pilot is identified as Captain Sheridan. He tells Ivanova not to worry, and that he will be back soon. Sheridan overrides the Starfury's controls, opens the bay doors, and launches the ship. Ivanova calls Garibaldi.
Urza's assistants prepare him for the duel when Londo and Vir enter. Londo tries to convince Urza to not fight, but Urza refuses. Urza tells Londo that he has often beaten him with such weapons, but Londo says that his life was never on the line before. Londo begins removing his jacket.
Garibaldi, in a Starfury of his own, contacts Sheridan asking him what he is doing. Sheridan says he is giving someone a lift, and that he thinks the answer lies in sector 14. Ivanova, who has been listening, realizes the significance, and Sheridan confirms her suspicions. The two Starfuries continue their voyage.
A referee tells Londo and Urza to begin the duel. They hold their swords before them, bow to each other, and begin the fight. During the course of the fight, they both manage to inflict some damage to each other.
Sheridan explains to Franklin, Garibaldi, and Ivanova that the lifeform that inhabited him was sentient, but alien, adn was trying to survive and return to its home. Sheridan explains that the alien entered the Markab's body and drove him mad. He explains that he deduced what it wanted by the images it created in his mind, using his emotions for communication. The prospect of such a new and different alien life form very much excites Franklin.
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