Babylon 5 is an American space opera television series created by writer and producer J. Michael Straczynski, under the Babylonian Productions label, in association with Straczynski's Synthetic Worlds Ltd. and Warner Bros. Domestic Television. After the successful airing of a test pilot movie on February 22, 1993, Babylon 5: The Gathering, Warner Bros. commissioned the series for production in May 1993 as part of its Prime Time Entertainment Network (PTEN). The show premiered in the United States on January 26, 1994, and ran for five 22-episode seasons.

The series follows the human military staff and alien diplomats stationed on a space station, Babylon 5, built in the aftermath of several major inter-species wars as a neutral ground for galactic diplomacy and trade. Major plotlines included intra-race intrigue and upheaval, inter-race wars and their aftermaths, and embroilment in a millennial cyclic conflict between ancient races. The human characters, in particular, become pivotal to the resistance against Earth's descent into totalitarianism.

Many episodes focused on the effect of wider events on individual characters. Episodes contained themes such as personal change, loss, oppression, corruption, and redemption.

Unusually for American broadcast television at the time of its airing, Babylon 5 was conceived as a "novel for television" with a pre-planned five-year story arc, each episode envisioned as a "chapter". Whereas contemporaneous television shows tended to maintain the overall status quo, confining conflicts to individual episodes, Babylon 5 featured story arcs which spanned multiple episodes and even seasons, effecting permanent changes to the series universe. Tie-in novels, comic books, and short stories were also developed to play a significant canonical part in the overall story.

Straczynski announced plans for a reboot of the series in September 2021 in conjunction with Warner Bros. Television. An animated feature-length, direct-to-video film, Babylon 5: The Road Home, was released in August 2023.

Setting

The main Babylon 5 story arc occurs between the years 2257 and 2262. The show depicts a future where Earth has a unified Earth government and has gained the technology for faster-than-light travel using "jump gates", a kind of wormhole technology allowing transport through the alternate dimension of hyperspace. The Colonies within the Solar System and beyond make up the Earth Alliance, which has established contact with other spacefaring species. Ten years before the series is set, Earth barely escaped destruction by the technologically superior Minbari, who sought revenge after an Earth starship unwittingly killed their leader during first contact, only for them to surrender unexpectedly on the brink of victory. Earth has since established peaceful relationships with them and the Earth Alliance has become a significant and generally respected power within the galactic community.

Among the other species are the imperialist Centauri; the Narn, who only recently gained independence from the Centauri empire; and the mysterious, powerful Vorlons. Several dozen less powerful species from the League of Non-Aligned Worlds also have diplomatic contact with the major races, including the Drazi, Brakiri, Vree, Markab, and pak'ma'ra. An ancient and secretive race, the Shadows, unknown to humans but documented in many other races' religious texts, malevolently influence events to bring chaos and war among the known species. Among the chaos the Shadows cause is a Centauri descent into irredentism and Earth sliding into totalitarianism under President Morgan Clark.

The Babylon 5 space station is located in the Epsilon Eridani system, at the fifth Lagrangian point of the fictional planet Epsilon III and its moon. It is an O'Neill cylinder long and in diameter. The station is the last of its line; the first three stations were all destroyed during construction, while Babylon 4 was completed but mysteriously vanished shortly after being made operational. It contains living areas which accommodate various alien species, providing differing atmospheres and gravities. Human visitors to the alien sectors are shown using breathing equipment and other measures to tolerate the conditions.

Cast

Regular cast Babylon 5 featured an ensemble cast which changed over the course of the show's run: Michael O'Hare as Commander (later Ambassador) Jeffrey Sinclair (season 1; guest seasons 2–3): The first commander of Babylon 5, later appointed Earth's ambassador to Minbar. Bruce Boxleitner as Captain (later President) John Sheridan (seasons 2–5): Sinclair's replacement on Babylon 5 after his reassignment and a central figure of several prophecies within the Shadow war. Becomes president of the newly formed Interstellar Alliance in season 5. Claudia Christian as Lt. Commander (later promoted to Commander) Susan Ivanova (seasons 1–4, guest season 5): Second in command of Babylon 5. Jerry Doyle as Michael Garibaldi: Babylon 5s Chief of Security for seasons 1-4; leads the covert intelligence arm of the Interstellar Alliance in season 5. Mira Furlan as Delenn: The Minbari ambassador to Babylon 5. Born Minbari, she uses a special artifact at the start of the second season to become a Minbari-human hybrid, and later marries Captain Sheridan. Richard Biggs as Doctor Stephen Franklin: Babylon 5s chief medical officer. Andrea Thompson as Talia Winters (season 1–2): A commercial Psi-Corps telepath who works aboard the station. Stephen Furst as Vir Cotto: Diplomatic aide to Centauri Ambassador Londo Mollari. Bill Mumy as Lennier: Diplomatic aide to Minbari Ambassador Delenn. Tracy Scoggins as Captain Elizabeth Lochley (season 5): Babylon 5s station commander following Ivanova's departure and Sheridan's resignation. Jason Carter as Marcus Cole (seasons 3–4): A Ranger, one of a group of covert agents who fight against the Shadows. Caitlin Brown (season 1, guest season 5) and Mary Kay Adams (season 2) as Na'Toth: Diplomatic aide to Narn Ambassador G'Kar. Robert Rusler as Warren Keffer (season 2): Commander of the Zeta Wing, one of Babylon 5s small fighter wings. Jeff Conaway as Zack Allan (guest season 2, main seasons 3–5): A sergeant in the Babylon 5 security force, replaces Garibaldi as Chief of Security in season 4. Patricia Tallman as Lyta Alexander (original TV movie, guest seasons 2–3, main seasons 4–5): A commercial Psi-Corps telepath who takes over for Talia when she leaves the station. Andreas Katsulas as G'Kar: The Narn ambassador to Babylon 5. Peter Jurasik as Londo Mollari: The Centauri ambassador to Babylon 5.

Recurring guests Wayne Alexander as Lorien: An alien of unknown origin that comes to Sheridan's aid after a critical moment in the Shadow War Ardwight Chamberlain (voice) /Jeffery Willerth (in the encounter-suit) as Kosh Naranek, the Vorlon ambassador to Babylon 5 Tim Choate as Zathras, an alien of unknown origins that is central to the disappearance of Babylon 4 Joshua Cox as Lt. David Corwin, a technician in Babylon 5s Command and Control center David L. Crowley as Ofc. Lou Welch, a member of the Babylon 5 security staff Robin Atkin Downes as Byron, a rogue telepath William Forward as Lord Antono Refa, a colleague of Ambassador Mollari who has his own designs on the Centauri throne. Robert Foxworth as General William Hague, the officer overseeing military operations related to Babylon 5 Denise Gentile as Lise Hampton, a former romantic interest for Michael Garibaldi during his time on the Mars colony Melissa Gilbert as Anna Sheridan, Captain Sheridan's wife. The first appearance of Anna Sheridan was portrayed by Beth Toussaint in a recorded message. Lenore Kasdorf as a reporter for the Interstellar News (ISN) network Walter Koenig as Alfred Bester, a senior officer of Psi-Corps who considers non-telepaths to be inferior Wortham Krimmer as Centauri Emperor Cartagia Damian London as Regent Virini, a member of the Centauri court under Emperor Cartagia Leigh McCloskey as Thomas Marjorie Monaghan as Number One / Tessa Holloran, the leader of the Mars resistance Julia Nickson-Soul as Catherine Sakai, a commercial explorer and Commander Sinclair's love interest Jim Norton as Ombuds Wellington, a judge aboard Babylon 5. Norton also played a projection of G'Kars father in "Dust to Dust" and Dr. Lazarenn, a Markab doctor, in "Confessions and Lamentations" John Schuck as Draal (younger), Delenn's teacher and friend from Minbar that becomes part of the Great Machine buried within Epsilon III Louis Turenne as Brother Theo, the leader of a group of Roman Catholic monks living aboard Babylon 5. John Vickery as Neroon, a member of the Minbari warrior caste that replaced Delenn on the Grey Council following her transformation Ed Wasser as Morden, a human agent working for the Shadows Efrem Zimbalist Jr. as William Edgars, a wealthy businessman who controls much of the economy in the Mars colony

In addition, several other actors filled more than one minor role on the series. Kim Strauss played the Drazi Ambassador in four episodes, as well as nine other characters in ten more episodes. Some actors had difficulty dealing with the application of prosthetics required to play some of the alien characters. The producers therefore used the same group of people (as many as 12) in various mid-level speaking roles, taking full head and body casts from each. The group came to be unofficially known by the production as the "Babylon 5 Alien Rep Group."

Synopsis

The five seasons of the series each correspond to one fictional sequential year in the period 2258–2262. Each season shares its title with an episode that is central to that season's plot.

Pilot film (1993) In the pilot film, Babylon 5: The Gathering, the Vorlon ambassador Kosh is nearly killed by an assassin shortly after arriving at the station. Jeffrey Sinclair, the commander of Babylon 5, is named as the prime suspect, but is proven to have been framed.

Season 1: Signs and Portents (1994) Commander Sinclair, a hero of the Minbari war, is troubled by his inability to remember events of the war's last day. Though supported by Minbari ambassador Delenn, who is secretly a member of the Minbari ruling Grey Council, other Minbari remain distrustful of him. The Narn ambassador G'Kar continually presses for concessions from the Narns' former overlords the Centauri Republic. Centauri ambassador Londo Mollari finds a new ally in the enigmatic Mr. Morden to strike back at the Narn. Meanwhile, xenophobic groups on Earth challenge humanity's tolerance of aliens. This tension culminates in the assassination of Earth's President Santiago, who favored such contact.

Season 2: The Coming of Shadows (1994–1995) Sinclair is transferred to be ambassador to Minbar, and General Hague assigns captain John Sheridan command of the station. Hague and Sheridan believe now-president Clark conspired in Santiago's death but have no proof. Clark gradually moves Earth in an isolationist direction and takes steps to install a totalitarian government. When the aging Centauri Emperor Turhan dies, Mollari and his ally Lord Refa install Turhan's unstable nephew Cartagia as emperor and force a war against the Narn. Aided by Mr. Morden's "associates" the Shadows, the Centauri decimate the Narn. The war ends with a planetary bombardment of the Narn homeworld, followed by the enslavement of the surviving Narns. Delenn and Vorlon ambassador Kosh request Sheridan's help to fight against their ancient foe, the Shadows.

Season 3: Point of No Return (1995–1996)