In 2262, Earthforce Captain Elizabeth Lochley is appointed to command Babylon 5. The station grows in its role as a sanctuary for rogue telepaths running from the Psi Corps, resulting in conflict. G'Kar, former Narn ambassador to Babylon 5, becomes unwillingly a spiritual icon after a book is published that he wrote while incarcerated during the Narn-Centauri War. The Drakh, former allies of the Shadows who remained in the galaxy, take control of Regent Virini on Centauri Prime through a parasitic creature called a Keeper, then incite a war between the Centauri and the Interstellar Alliance, in order to isolate the Centauri from the Alliance and gain a malleable homeworld for themselves.
Centauri Prime is devastated by Narn and Drazi warships and Londo Mollari becomes emperor, accepting a Drakh Keeper under threat of the complete nuclear destruction of the planet. (Portions of the end of his reign are seen in various prescient visions throughout the series; they show Mollari and former nemesis (and later friend) G'Kar sixteen years in the future dying at each other's throats, seemingly out of their grudge. It is gradually revealed that there was a much more friendly subtext, with Mollari having become a slave to the drakh rule and being tired of life; his Drakh Keeper awakens and strangles G'Kar in return. Vir Cotto, Mollari's loyal and more moral aide, succeeds him as emperor, free of Drakh influence. Sheridan and Delenn marry and move to Minbar, along with the headquarters of the Interstellar Alliance. G'Kar leaves Babylon 5 to escape his unwanted fame and explore the rim. Garibaldi also marries and settles down on Mars. Most of the other main characters leave B5.
Nineteen years later on the verge of death, Sheridan takes a final trip to the obsolete Babylon 5 station before its decommissioning. Sheridan apparently dies but is claimed by the First Ones, who invite him to join them on a journey beyond the rim of the galaxy. Babylon 5 station is destroyed in a demolition shortly after Sheridan's departure, its existence no longer necessary as the Alliance has taken over its diplomatic purposes. This final episode features a cameo by Straczynski as the technician who switches off the lights before Babylon 5 is demolished.
百度網友評論：巴比倫5號第五季故事情節緊湊且跌宕起伏，深刻地反映了人性的復雜情感，恰到好處地烘托了巴比倫5號第五季的氛圍和節奏，使得整部作品更加生動有力，本人覺得這總體感覺還是值得一看的一部佳作！
豆瓣網友評論：巴比倫5號第五季的實力派演員的演技碰撞，為《巴比倫5號第五季》增添了無窮的魅力和看點，讓觀眾在觀影過程中始終保持著緊張與期待，個人認為這是一部具有深刻主題、精湛演技和高水準制作的佳作！
愛奇藝網友評論：巴比倫5號第五季在制作上也頗具特色，無論是唯美的畫面還是緊張的氛圍營造，都展現出了制作團隊的用心與才華，讓觀眾對劇情以及角色充滿了好奇與猜測，個人認為這是一部具有深刻主題、精湛演技和高水準制作的佳作！
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