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Commander Sinclair receives a mysterious letter, kept by the priest cast for nine hundred years to be delivered at a specific day and time. Messages from the past or future, Babylon 4 in a temperal flux - there are mysteries to solve and Sinclair, now ambassador, is the key. He returns to Babylon 5 meaning to set everything right. Delenn received a letter too, and plays a significant role in past, present and future. The planet below is finally fulfilling its purpose and our heroes are shown what they've already done and now must do.
Rathenn: (referring to Sinclair) I have the strangest feeling I will never see him again.
Ambassador Ulkesh: He is the closed circle. He is returning to the beginning.
Rathenn: The beginning of what?
(Ambassador Ulkesh walks away)
Captain Sheridan: You know, back at the station, I was pretty surprised to see you walk into the War Room. When an ambassador comes to visit, we usually have some advance warning.
Sinclair: There wasn't time. And believe me, my being here is as much of a surprise to me as it is to you.
Captain Sheridan: Is it?...Delenn either knew you were here or knew you were coming. Your timing seems like more than just a coincidence.
Sinclair: There are no coincidences, Captain.
Captain Sheridan: That's not much of an answer.
Marcus: Captain, if I were you, I'd quit while I was ahead. Back on Minbar, there was a saying among the other Rangers: "The only way to get a straight answer out of Ranger One was to look at every reply in a mirror while hanging upside down from the ceiling."
Captain Sheridan: (laughs) Did it work?
Marcus: Oddly enough, yes. Or after a while you passed out and had a vision. Either way, the result was pretty much the same.
Sinclair: Zathras, this is very important. When you meet me again, it will be me but it won't be me now. So you're not to say anything to me that might change the past. Do you understand?
Zathras: Zathras understand...No. Zathras not understand. But Zathras do! Zathras good at doings, not understandings.
Captain Sheridan: What else is on this list of things you're not supposed to mention?
Zathras: Zathras…does not remember. But if Zathras remember later, Zathras tells you.
Sinclair: I need Lennier to stay on the ship. Can you get the equipment up here by yourself?
Zathras: Yes, yes! Zathras is used to being beast of burden to other people's needs. Very sad life! Probably have very sad death, but at least there is symmetry!