All my life I've had doubts about who I am, where I belong. Now I'm like the arrow that springs from a bow, no hesitation, no doubts. The path is clear.
—Ambassador Jeffrey Sinclair
On the Minbar homeworld, a Minbari, Rathenn, is shown delivering a box to a hooded figure. Rathenn explains that he and his fellow priests are obeying its instructions written nine hundred years prior, to open it exactly today. The figure reaches and looks inside and sees an envelope addressed to Jeffrey David Sinclair in English. He removes his hood, revealing himself as Ambassador Sinclair(!), also known as the Entil'Zha, or leader of the Rangers. Rathenn wonders aloud how "he" knew where Sinclair he would be in 900 years. How, indeed...In Babylon 5, C&C is picking up a distress call from the quarantined Sector 14, the place where Babylon 4 disappeared. Ivanova asks to put it through and, to their amazement, her own voice is heard calling out for help, with explosions in the background. It is dated eight days into the future.In the temple in Minbar, Sinclair, with the letter still in his hand, is waiting for his ship to Babylon 5. Rathenn announces that it is ready and offers his help if Sinclair would confide in him, but Sinclair tells him that this was meant for him alone. He thanks Rathenn for being the first to trust him after he came to Minbar, then gets up. As Rathenn watches Sinclair leave, somehow sensing that they will never meet again, the Vorlon Ambassador to Minbar joins him.
- Vorlon: He is the closed circle. He is returning to the beginning.
Rathenn: The beginning of what?
- Sinclair: Never lets you finish a sentence.
Sheridan: Yeah, I've noticed that.
- Marcus: Captain, if I were you I'd quit while I was ahead. Back on Minbar there was a saying among the other Rangers, that 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.Sheridan: 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.
- Ivanova: I'll be in the car.
- Sinclair: Ready?
Delenn: Why do your people always ask if someone is ready right before you're going to do something massively unwise?
- All There in the Manual: The canon novel To Dream in the City of Sorrows tells us exactly what Sinclair's been up to in the two years since he was recalled to Earth. (Answer: Restarting the Rangers, being Earth's Ambassador to Minbar, and letting Catherine Sakai in on all of it. Among other things.)
- Bad Future: A bloodied Ivanova pleading for help as the Shadows attack B5, moments before the station explodes.
- The Centauri Prime of 2278 has seen better days. Emperor Mollari is irate at Sheridan and his allies for allegedly throwing the Centauri homeworld under the bus. Subverted in that Centauri Prime's destruction is a fixed point in history, and won't be averted.
- The Bus Came Back: Sinclair makes his triumphant return in this two-parter, though he's previously been seen on wall monitors.
- Camera Abuse: Future Ivanova switches the viewscreen to transmit from one of B5's external cameras, proving beyond a shadow of a doubt that The Shadows are slated to destroy the station in eight days. A Shadow vessel clips the camera, cutting the feed.
- Characterization Marches On: Ulkesh (the Vorlon ambassador) doesn't have such a harsh voice as he does in later episodes.
- Continuity Nod: Garibaldi's attempted passwords.
- Cryptic Conversation: Sinclair's getting to be as bad as the Vorlons in this regard.
- Did I Say That Out Loud:Zathras: Draal gave Zathras list of things not to say. This was one. No—Not good. Not supposed to mention "One", or "The One". ...You never heard that.
- Do You Trust Me?: Delenn asks this of Sheridan before they depart for Babylon 4. It's supposedly the single "most important question" she has ever asked him. (He does, with his life.)
- Evil Old Folks: Emperor Mollari is pretty grouchy. He's seemingly been seething at Sheridan for an untold number of years.
- Fan of the Past:Sinclair: Besides, I think we'll work well together. Like Butch and Sundance. Lewis and Clark. Lucy and Ethel. [Sheridan looks nonplussed with that last one.]
Sheridan: As my great-grandfather used to say, "Cool."
- Lennier outlining the capabilities of the White Star's bio-armor.
- Flashback: Zathras' previous encounter with Sinclair two years ago. ("Babylon Squared") His momentary confusion while in Sinclair's presence is explained by Future Sinclair, who warns Zathras not to let on that they've met previously.
- When Garibaldi boarded Babylon 4 with Sinclair two years earlier to evacuate the crew before it disappeared again, he experienced vision of a battle inside Babylon 5, and they were losing it. Sinclair experiences the same vision while onboard the White Star.
- Fantastic Honorifics: We first hear the title of the Ranger leader here, Entil'zha. This is apparently a higher position than just Ranger One, and no one has held it since Valen himself.
- Flashback with the Other Darrin: Borderline example. In a vision depicting Babylon 5's destruction at the hands of the Shadows, Sinclair and Garibaldi both have different hairstyles than they do here. In particular, Jerry Doyle sports his easily-identifiable Season One hair, which only emphasizes his rapidly-deteriorating hairline.
- Foreshadowing: Both Sinclair and Delenn receive letters from an anonymous source (later revealed to be Valen) instructing them to deliver Babylon 4 to the past. As revealed in part 2, Valen is actually Sinclair, reincarnated as a Minbari and transported 1000 years into the past, where he aids in the original overthrow of the Shadows (Hence "a Minbari not born of Minbari"). This also explains the Vorlon's cryptic statement regarding Sinclair as "the circle".
- Futureshadowing: The disappearance of Babylon 4 is the single greatest mystery of the century. Now Sheridan's being told that he's the guy who stole it, and what's more, he hasn't done it yet!
- Londo's ascension to Emperor, and the destruction of Centauri Prime.
- Good Scars, Evil Scars: Sinclair now sports an L-shaped scar on his left cheek, the origin of which is unmentioned. (It gets some explanation in the novels, specifically To Dream In the City of Sorrows.)
- Gone to the Future: Sheridan winds up in the future after his stabilizer is damaged in an explosion.
- Half Truth: Sinclair backs up the testimony given by Delenn, claiming the information came from "a very reliable source". (i.e. himself)
- Have We Met Yet?: Zathras meeting up with Sinclair again. This is their first meeting for Zathras; the Zathras of "Babylon Squared" originated from a later point in time.
- In the Hood: Sinclair during in the Cold Open.
- Intertwined Fingers: Sheridan and Delenn do this almost unconsciously on the arm of his command chair. Sinclair seems to approve. Since Sinclair is by this point fully committed to Catherine Sakai — take a gander at To Dream in the City of Sorrows — his approval makes total sense.
- "Join the Army", They Said:Sheridan: When I joined Earthforce, the sign said, 'The Greatest Adventure of All'. ...If they only knew.
- Lost Technology: The time stabilizers are this (and a convenient Plot Device), courtesy of Draal and the Great Machine.
- Make It Look Like an Accident: The Shadows are racing to plant a fusion bomb on the hull of Babylon 4, intending to make its destruction look accidental. Presumably, they don't like temporal paradoxes any more than the heroes do.
- Make Wrong What Once Went Right: The Shadows apparently got wise to the Minbari's plans for Babylon 4, sending fighter ships through the time rift in order to destroy the station in the past. However, we know that the White Star intercepted their plan and guided Babylon 4 to safety, because Draal (thanks to his predecessor Varn) has a recording of it.
- Man in White: Emperor Mollari.
- Necessary Fail: Sinclair seems to sense his number's almost up. Delenn is also aware of it, but his sacrifice is somehow crucial to repairing the timeline.
- Non-Answer: Sheridan's response to Sinclair's Cryptic Conversation is, "That's not much of an answer."
- Obfuscating Stupidity: Zathras knows much more than he's letting on, and later events will suggest that his "accidental" revelations may have been completely intentional.
- Ominous Message from the Future: The transmission from Sector 14 of Babylon 5 about to be overrun, dated eight days in the future.
- The Password is Always "Swordfish": Justified; Sinclair sends Garibaldi a password-protected message without providing the password (presumably so no one else could open the message before it reached Garibaldi), forcing him to guess. The password turns out to be a phrase that very few other people would guess, as it had started a previous message sent specifically to him: "Hello, old friend".
- Phlebotinum Breakdown: Sheridan's time stabilizer. (What a surprise.)
- Portal to the Past: The Great Machine is responsible for opening the time rift and allowing Babylon 4 to be pulled backward through time. However, opening the rift strains the Machine, and Draal, to its limits.
- The Reveal: Sinclair removing his hood.
- Real Life Writes the Plot: Jerry Doyle had a vocal dislike of Michael O'Hare, evidently due to their differing acting styles, but possibly due to O'Hare's schizophrenia causing... issues. Rumor had it that Doyle refused to share any scene with his former co-star for this one, which necessitated a plot in which Sinclair continually dodges Garibaldi.
- Sapient Ship: The White Star is outfitted with a "bio-armored" hull similar to those on Vorlon ships. This adaptive skin is capable of learning from experience in order to better protect the crew in future engagements; its previous encounters with Shadow vessels have strengthened its resistance to some Shadow weapons. It also has an ability to 'heal' itself after sustaining damage.
- Set Right What Once Went Wrong: Sinclair and Delenn's mission to deliver Babylon 4 safely through the temporal rift.
- Snowy Screen of Death: Future Ivanova's distress signal is terminated with static. Poor Garibaldi gets to watch it five times in a row.
- Stable Time Loop: Sinclair telling Zathras not to let on to his past self (the Sinclair from "Babylon Squared") that they've met already.
- There Are No Coincidences: Directly stated by Sinclair when Sheridan starts asking a few too many questions.
- Time-Travel Tense Trouble: Zathras seems to be channeling the audience's confusion in certain scenes.
- Unstuck in Time: Trope Namer, courtesy of Sheridan's broken time stabilizer.
- What Year Is This?
- Why We Can't Have Nice Things: Directly quoted by Zathras after he recovers Sheridan's busted stabilizer. "This is why Zathras can never have nice things!" (Priorities, dude, priorities.)