Back on Babylon 5, C&C detects a distress call coming from sector 14, which surprises Ivanova since it has been quarantined for nearly 3 years after Babylon 4 disappeared there. Lt. Corwin plays the message, and it is Ivanova's own voice, which a computer voice scan confirms. "They're coming through," Ivanova's voice cries out desperately, "repeat, they're coming through. This is Earth Alliance Station Babylon 5. They're all over the place! They're killing us. Can anyone hear me? They're killing us!"
Ivanova plays back the distress signal for Sheridan and Garibaldi, but denies ever having sent the message. Garibaldi corrects her, saying that she hasn't yet, but since it comes from sector 14 - a place where time doesn't work right - anything is possible. Garibaldi relates to the others that, when he visited Babylon 4 two years earlier, he had a flash-forward in which he experienced the fall of Babylon 5, which could very well be the same thing to which this message refers. Garibaldi tells Sheridan he wants to check it out, and Sheridan agrees.
Zack Allen is having quite a time trying to process the identicards of those in the station's docking bay, but while he is processing them, he comes across a very interesting one - that of Ambassador Sinclair. Zack welcomes Sinclair back to the station, and asks him if he plans to be staying long. Sinclair says that is a more interesting question than Zack probably knows, and disappears into the crowd.
Marcus and Sheridan are in the war room talking when Delenn arrives, telling them that they must both accompany her to the White Star, with Ivanova, and one other. The other is Sinclair, who enters the war room. He tells Sheridan that he appreciates the work he has done looking after the station. Garibaldi calls in, reporting that the temporal rift in sector 14 is twice as large as it was before, and that it is being created by a tachyon beam emanating from Epsilon 3.
Sheridan asks Delenn why they are going to the White Star instead of to Epsilon 3, but Delenn simply insists that they must go to sector 14. Sheridan doesn't understand, but Delenn promises to explain everything when the time is right. Meanwhile, Garibaldi finally arrives at sector 14, and performs a scan on the temporal rift formed there.
Two ships depart from Babylon 5, carrying those going to the White Star. Sheridan tells Sinclair that he was very surprised to see him in the war room, but Sinclair says that he was just as surprised to be there. Sheridan mentions that Sinclair's timing seems to be more than a coincidence, to which Sinclair replies that there are no coincidences. Marcus tells Sheridan to quit while he's ahead, since Sinclair has a reputation, back on Minbar, for seldom giving straight answers to questions.
Everyone arrives in a conference room in the White Star. Delenn asks Sheridan if he trusts her, and he admits that he would trust her with his life. She invites them all to sit down. She begins by telling them that she was aware of the transmissions from Epsilon 3 several hours before they left, the same time that other information came into her possession. "As you know," she explains, "our last great war against the Shadows was a thousand years ago. With the help of the Vorlons and a few others, we were able to defeat them, driving them from their homeworld, Z'ha'dum. But... there is something you do not know. What you are about to see has never been shown to anyone outside the Grey Council."
She touches a small device, and on the wall behind her, an image appears showing a great space station, with many ships around it, fighting. "This is one of the few surviving records from that war. Toward the end, the tide of battle had turned against us. Our greatest starbase, the center of our efforts in the war, had been destroyed by the Shadows. Without a long-range base of operations from which to launch our forces, we were doomed to lose the war. Then, as if in answer to our prayers, a replacement arrived." She touches the device again, and something very familiar appears on the screen.
"Oh my God," Ivanova says. "We always knew that Babylon 4 had been taken to somewhere in time, but we assumed it was into the future."
"No," Delenn says, "it was taken into the distant past, where it helped us defeat the Shadows. Without Babylon 4, we would have lost the war, or it would have ended in a stalemate."
"So you're saying the Minbari... that you stole Babylon 4...?" Sheridan says.
"Not quite," Delenn tells them. "Before coming to you, I received two additional records from Draal. Remember, the Great Machine on Epsilon 3 has been there for over 500 years. During that time, it recorded much of what happened in this area of space." She changes the image to Babylon 4 again. "After Babylon 4 vanished six years ago, it reappeared again, two years ago. Ambassador Sinclair and Mr. Garibaldi traveled there at great personal risk to help evacuate her crew before it vanished again."
"It was a close call," Sinclair tells them, "we almost didn't get out. We never did find out who was behind it."
"And that is about to change," Delenn replies, changing the image again. "This was recorded shortly before the station first disappeared six years ago. As Babylon 4 neared completion, the allies of the Shadows recognized it for what it was, and sent these ships to destroy it. Striking without warning, they would have succeeded in their attack, but something stopped them." A ship appears on the screen, firing at the Shadow fighters.
"The White Star?" Sheridan asks.
"Delenn, are you saying we stole Babylon 4?" Marcus asks.
"But that was years ago!" Ivanova says.
"Yes!" Delenn says. "And that is exactly where we must go. At this moment, the Great Machine is using all its power to enlarge the temporal rift in sector 14. We will use it to go back six years into the past. Once there, we must prevent the destruction of Babylon 4, and take the station with us through time. Because, if we fail to save Babylon 4, Babylon 5 will also be destroyed."
Sheridan can't believe that he is responsible for the disappearance of Babylon 4, but Delenn says that it has already happened, and all they must do is establish the past. No one knew where the replacement station had come from until she came to Babylon 5, and she was afraid to say anything, for fear of changing the future. Marcus says he isn't sure how moving Babylon 4 through time will save Babylon 5. Delenn answers that, without Babylon 4, the Shadows would come out of the last war much too strong - something with which Sinclair agrees. Sheridan asks where the information came from, but Sinclair just says a reliable source. Marcus says that, if Sinclair believes it, he believes it. Delenn says that, if they do not proceed, in the next major attack by the Shadows, Babylon 5 will be destroyed. Sheridan calls Garibaldi, who says that he has been recording everything he can, and that the time stamp on the distress messages is eight days in the future. Based on this, Sheridan reluctantly agrees to go along with the plan. He calls Garibaldi and says they will investigate further, and that he should return to Babylon 5.
As the White Star meets Garibaldi's Starfury, Sheridan tells Garibaldi it is important to go back to Babylon 5, even though Garibaldi very much wants to go with them back to Babylon 4. Garibaldi doesn't understand, but complies. After Garibaldi has gone, Sheridan asks Sinclair if he didn't want to talk to Garibaldi himself, and Sinclair tells him he did. He walks away to a viewscreen, where he watches Garibaldi's ship fly off. He remembers the flashforward he experienced on Babylon 4, as well as the destruction of Babylon 5 he saw a couple years earlier in Ladira's vision. He promises himself that he won't let it happen.
As the White Star makes its journey into the past, Garibaldi arrives back at the station, where he meets Zack, who tells him that Sinclair was there. Garibaldi is shocked, unable to believe Sinclair would leave without saying anything.
The White Star emerges from the temporal rift, and before long, detects the ships sent to destroy Babylon 4, which are escorting very powerful fusion bomb. The White Star moves to intercept the ships. The ships fire on the White Star, but there is neglible damage due to, Lennier explains, the ability the ship has to learn from previous encounters.
Though the weapons are outside optimum firing range, Ivanova is able to fire at the ships manually, destroying the fusion bomb. A huge blast is created, and the White Star is caught in it. Sheridan's time stablizer is hit by a blast of energy, and he vanishes. Zathras runs up to the damaged stabilizer, and explains that Sheridan has become unstuck in time, and could be in either the past or the future. Though everyone is very concerned and wants to find Sheridan, Sinclair knows that the mission is what is truly important, and if they wait too long, they may lose their one chance to move in under Babylon 4's damaged scanners.
Sheridan is thrown down onto the floor and kicked. He is picked up by several guards, who say that he is awake again. Sheridan looks at the figure on the throne, and recognizes it as Londo, who looks quite a bit older than Sheridan is used to him.
The White Star connects to Babylon 4, and the crew exits the ship. Though the configuration of the station is different, Ivanova believes she can find her way around. Ivanova needs to secure the primary corridors while they place the homing device, and Marcus goes off with her to help. Sinclair asks Zathras if he will be able to unload and prepare the equipment by himself, and Zathras indicates he can.
"Ready?" Sinclair asks Delenn.
"Why do your people always ask if someone is ready before you're going to do something massively unwise?" she asks him.
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