The final battle for the galaxy has begun, and more is at stake than ever before. On Centauri Prime, Lando finds himself in a desperate race against the clock, fighting to cleanse his homeworld of every last vestige of Shadow influence. His mission: avert the total annihilation of his species by the unforgiving Vorlons. Will his efforts be enough, or will he inadvertently seal the doom of the Centauri?

Across the cosmos, Sheridan, Delenn, and the beleaguered Alliance of Worlds fight a desperate, impossible war, striving to simply be heard by the ancient warring powers. But when they finally capture the attention of the Vorlons and Shadows, the consequences are catastrophic: Sheridan and Delenn are pulled into a direct, mind-bending confrontation – a telepathic battle of ideals that threatens to consume them both. Can Babylon 5 survive this final, impossible challenge, or will the galaxy succumb to pure, unyielding extremism?

In "The Long Night," Sheridan and his crew painstakingly orchestrate a high-stakes strategy to force the Shadows and Vorlons into a direct confrontation. Meanwhile, on Narn, Emperor Cartagia's preparations for G'Kar's execution intensify, while Londo races against time to remove Cartagia from power, desperate to prevent the Vorlons from annihilating Centauri Prime under the Shadow's influence. The episode also delves into personal struggles, as Sheridan shares a deeply emotional moment with Ivanova, revealing her fear of being alone, and grapples with one of the most gut-wrenching decisions of his command, sending a Ranger on a perilous suicide mission to sway the Vorlons.

In the pivotal episode "Falling Towards Apotheosis" from Season 4 of Babylon 5, the tension escalates as Captain Sheridan faces a critical decision with the Vorlon fleet advancing against the Shadows. Sheridan and Lorien devise a strategy to counter the Vorlons by targeting Ulkesh, a key Vorlon figure, aiming to blind their enemy and shift the balance of power.

On Centauri Prime, Londo Mollari presents Emperor Cartagia with a proposition, offering a legacy of remembrance post-ascension. However, Cartagia's true intent is revealed: he plans to exploit the Shadows for his own divine ambition, indifferent to the impending destruction. The episode culminates in uncertainty, leaving viewers questioning the outcome of Sheridan's confrontation, the fate of Babylon 5, the destiny of Centauri Prime, and Sheridan's survival.