The "mirror universe" is the informal name for a parallel universe, so named because many people and places are "opposites" of their counterparts in "our" universe, with "evil" replacing good and vice versa. (Star Trek: The Original Series, Star Trek: Deep Space Nine)
During the 22nd century, the capture of USS Defiant, a Starfleet vessel from a hundred years in the future, helped to solidify the Terran Empire's grip on power and dominance over the quadrant. (ENT: "In a Mirror, Darkly", "In a Mirror, Darkly, Part II")
The chance interaction between Starfleet officers from the primary universe during the 23rd century, with their counterparts from the mirror, eventually led to the Terran Empire being reduced to its home solar system only ( although most of the Alpha and Beta Quadrants believed the Empire was destroyed) and the rise of the Klingon-Cardassian Alliance. (TOS: "Mirror, Mirror"; DS9: "Crossover"; Star Trek: The Next Generation comic: "Mirror Broken")
Spock became the Empire's Commander-in-Chief, but was overthrown shortly thereafter by the Imperial Starfleet. David Marcus led an underground resistance dedicated to carrying on Spock's vision of reform, but made a tragic miscalculation. (A Debt of Honor) At some point the Empire located an Iconian Gateway and attempted to take control of it. (The Gift)
The Hydran Kingdom of the real world engaged a freighter from the mirror universe version of the Kingdom in combat, Cargoship A380, who, in the Mirror Universe, was meant to capture a freighter full of alcohol for an university. (Party School)
The Terran rebellion leads to the Empire's resurrection by 2379, when the Empire is at war with the Imperium (located in the Delta Quadrant) ruled by the mirror counterpart of Kes. (Star Trek: Arcadia)
- This continuity, which ceased to exist when Arcadia continuity was revamped, served as inspiration for Star Trek: New Empire.
In 2381, the USS Intrepid (NCC-74600) was sent to the mirror universe where they encountered the mirror Dominion at Terok Nor. The Dominion went to war but the Intrepid left before it could be destroyed in battle. (Star Trek: Distant Horizon)
The USS Dragon-A was accidentally transported by an anomaly to the mirror universe, arriving in the 20th century, two months after the start of the Eugenics Wars and before Earth possesses advanced space travel.
The ISS Sentinel appears and attacks the Dragon. The Sentinel's original mission was to test an experimental device that allowed them to cross-dimensional barriers easily, but the mirror Chris Harriman's desire to test his abilities leads to the Sentinel's destruction.
A second Terran Empire evolved from the Terran rebellion after the destruction of the Klingon-Cardassian Alliance. 300 years later, the emperor of the Terran Empire plans to invade our universe. They eventually lead an assault on our universe.
After repelling the invasion, the forces from our universe plan a counter-attack by taking the war into the mirror universe. ("Alternate Invasion, Part 2")
The Terran rebellion leads to the Empire's resurrection after 2375, in the form of the Imperial Union of Planets, which reclaims most territory of the original Terran Empire by 2385. (Star Trek: New Empire)
In 2371, at the same time Smiley O'Brien visited Deep Space 9 and stole schematics for the Defiant, he acquired schematics of the Phoenix-X and put one into construction as well. (DS9: "Through the Looking Glass", Star Trek: Phoenix-X: "Mirrorlyness!")
In 2375, the Phoenix-X in the original universe accidentally used an iso-star to bring the Phoenix-X of the mirror universe to our own. Upon the encounter, the crew of the mirror version changed their ship's name to Phoenix-V. The Doctor on the mirror Phoenix-X transferred the Gotens mirror symbiont into a Trill substitute named James. It wasn't long until tensions arose and the Phoenix-X destroyed its mirror ship. James escaped safely on a shuttle. ("Pure Evil")
In 2377, James Gotens found a girlfriend in the mirror universe named Lex Seifer, whom he convinced to trade her symbiont with Night Gotens on a trip back to the primary universe. They were then turned into Lex Gotens and Night Seifer. Night Seifer chased Lex and James back into the mirror universe. While there, they encountered a mirror species of the Jem'Hadar called the Nega'Jem. A group of Nega'Jem ships returned to the primary universe when Seifer returned empty-handed. ("Secret Shuttles, Part II")
In 2382, James and Lex returned to the primary universe in the Raptor to bring the Phoenix-X into the mirror universe where the Seifer symbiont would come to life on its own. Since the symbiont was evil, it took James' command and planned to join the Klingon-Cardassian Alliance. The Phoenix-X crew thwarted the plan, and the ship returned to the primary universe. James and Lex, along with the mirror Raptor, were apprehended by Smiley on the mirror Defiant. ("Mirrorlyness!")
The next year, the crew of the previously destroyed Phoenix-V were brought back to life by an omnipotent being named Rein. He plucked the crew out of corporeal existence mere seconds before the destruction of the ship and then re-materialized them eight years later aboard his own ship, the Socom. The mere action itself was to promote him to full omnipotent status - a power to which he used later to transport the crew back into the Mirror Universe. Before transport, the crew had hijacked and killed the crew of the USS Fusion. When they re-emerged in their own universe, they renamed the ship ISS Phoenix-X for the Klingons had conspired to bring such a named vessel back to the Alliance from the very beginning. ("Broken Pieces")
Operation Blackjack, in 2288-89, focused on a conspiracy involving the Terran Empire's Imperial Intelligence and members of the Starfleet Admiralty in the "prime" universe. (Star Trek: Shadowstar Station: Operation Blackjack)
In 2293, Captain Hikaru Sulu and the crew of the USS Excelsior were transported aboard the ISS Excelsior, where they were pursued by Commander Pavel Chekov on the ISS Enterprise-A throughout the Alpha Quadrant as the Excelsior crew attempted to return home.
Sometime after 2293, mirror Chekov assisted in the uprising of the Klingon-Cardassian Alliance. When doing so, he came into contact with the non-corporeal Pah-wraiths, who gave him some of their power. Now immortal, Chekov helped the Alliance grow from the sidelines, never seen nor heard.
In 2382, the Terran rebellion had finally pushed the Alliance back and began the first phase of a new Terran Empire. The Pah'Wraiths, manifesting as a supernatural ion storm, passed along the border between both territories and gave random ships their power.
An Aeon Ryku stole a Lokirrim ship and named it the ISS Descent. He was sent on a mission to protect the upcoming Empress aboard the ISS Bozeman and ISS Hathaway which were attacked by a Cardassian ship infused with Pah'Wraith energy, commanded by Chekov. Upon defeating the ship, Aeon met with the Pah'Wraiths and the Descent and was given some of their power. (Star Trek: Shattered Universe)
In 2370, Scott Freeman joined the Terran rebellion. ("The Mirror Cracked")
The Terran Empire formed an alliance with the Romulans in 2250 after an exhausting, decades-consuming war. The alliance was dissolved in 2418, when Praetor Turan tr'Kaleh declared independence. He tried to gain a strategic advantage over the Terrans by using newly invented technology to open the Bajoran wormhole (considered mythological until then), but spurred a Borg invasion. For a brief time, all enemies, Terrans, Romulans, and Klingon rebels, worked together in order to save the four quadrants from the Borg. Once they were repelled, much of the territory fell into anarchy.
- Just as Remington takes place in a different universe from the main Trek continuity, the Remington mirror universe is not the same mirror universe as that which appears in most other stories.
Earliest records of the Terran Empire date back to the Roman Empire, which had not fallen as in the normal universe. They took the name Terran Empire after bringing the entire planet under their control.
After the Terran Rebellion, they would form the New Terran Empire, which would be as oppressive and dangerous as the old one. Captain Rachel Covaks and her crew would encounter them in the Badlands in 2409, perhaps an early test of a machine that would lead to an invasion.
According to Reshek Taryn, a Starfleet temporal agent from the 2450s, the mirror universe had its roots in an alternate timeline where the Western Roman Empire took slightly longer to fall than in the prime universe, due in part to Emperor Valentinian III being overthrown by General Flavius Aetius after his victory at the Catalaunian Plains. Also leading to its formation were versions of 20th and 21st century events where the National Socialist Party, the Trumpers, the Optimum Movement, and the Krasnov junta were slightly more successful. The major change, however, came with the Borg temporal incursion at the Battle of Sector 001, which led to a new timeline fraying off from the main "rope" of time and ultimately the formation of the Terran Empire. ("Brother on Brother, Daughter on Mother")
In 2409 and 2410, there were a series of incursions by the Second Terran Empire into the prime universe, including commerce raids and an attack on the Romulan Republic starbase Vauthil Station. Eventually the USS Jadzia Dax was able to track Terran raiders back to their base in the Arawath system, and after a pitched battle a joint Starfleet-Cardassian-Klingon-Gorn fleet secured the system. USS Bajor then proceeded into the mirror universe through a Terran-built portal to eliminate the threat by retrieving the prime universe version of the Orb of Possibilities, stolen by the Terrans and replaced with its double. (The Wrong Reflection)
In 2412, Terran defector Huang Shou-Hui described the Terran Empire as a nightmarish fascist regime with a complex racial caste system maintained by the ruling "Optimal Party". Sexual slavery of "Sub-Optimal" women was common, a fate which Huang narrowly escaped by murdering his way up the ranks. The Optimal Hierarchy Assurance Bureau formed part of Terran state security, presumably focused on maintaining the caste system. (Live, not Survive)
Commander Robert Tacket believed he had inadvertently created the divergence from the Prime Universe that created the Mirror Universe when he retrieved Captain Jack Carter, who had time-traveled back to the American Revolutionary War. (FAR: "For Want of a Nail", "The Crossing")
Stories involving the mirror universe
- The Wrong Reflection
- "Brother on Brother, Daughter on Mother" (referenced only)
- Live, not Survive
- Before In a Mirror, Darkly
- Mirror universe article at Memory Alpha, the canon Star Trek wiki.
- Mirror universe article at Memory Beta, the non-canon Star Trek wiki.
- Mirror universe article at Wikipedia, the free encyclopedia.
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