Mirror universe

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.

History
The history of the mirror universe during the 22nd to the 24th century has been shaped largely due to influence from the "primary" universe.

During the 22nd century, the capture of 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. 

The chance interaction between Starfleet officers from the primary universe during the 23rd century, with their counterparts from the mirror, who eventually led to the downfall of the Terran Empire and the rise of the Klingon-Cardassian Alliance. 

Nearly a hundred years later another chance interaction would bring about a Terran rebellion against the Alliance. 



A Debt of Honor, The Gift
In the continuities of these two stories, Spock became the Empire's Commander-in-Chief as portrayed on DS9, but was overthrown shortly thereafter by the Imperial Starfleet. In A Debt of Honor David Marcus led an underground resistance dedicated to carrying on Spock's vision of reform, but made a tragic miscalculation, while in The Gift the Empire's attempt to secure an Iconian Gateway backfired. In both of these timelines the Alliance subsequently conquered the Empire.

Star Trek: Arcadia
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. This continuity, which ceased to exist when Arcadia continuity was revamped, served as inspiration for Star Trek: New Empire.

Star Trek: Distant Horizon
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)

Star Trek: Dragon
In Star Trek: Dragon's first episode, the USS gets transported by an anomaly to the mirror universe in the 20th century, two months after the start of the Eugenics Wars, before Earth possesses advanced space travel. They have to find a way out of the mirror universe to get back home. In Dragon's fifth season, the ISS appears and attacks the crew. The Sentinels original mission was to test an experimental device that allowed them to easily cross dimensional barriers, but the mirror Chris Harriman's desire to test his abilities ends with the Sentinels destruction.

Star Trek: Mirror Wars
In Star Trek: Mirror Wars, 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, which is the main basis for the Star Trek: Mirror Wars storyline.

At the end of the episode "Alternate Invasion, Part 2", Starfleet and a few other species' fleets are about to cross over to the mirror universe, planning to invade mirror-Earth.

Star Trek: New Empire
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)

Star Trek: Phoenix-X
In 2371, at the same time Smiley O'Brien visited Deep Space 9 and stole schematics for the Defiant, he stole schematics of the Phoenix-X and put one into construction as well. (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 Phoenix-V transferred Commander Gotens into a Trill substitute named James. It wasn't long until tensions arose and the Phoenix-X destroyed the Phoenix-V. 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 2379, Seifer's symbiont was experimented on by the Gordarions, making it come to life on its own when in contact with another quantum state or the mirror universe. ("Occurrence, Part I")

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 simply plucked the crew out of coporeal 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")

Star Trek: Pioneer
In 2387 a war began between the Terrans and the Alliance of Independent Governments. It lasted until 2389 when the Terran Empire was finally re-established. The remnants of the old Terran Starfleet were recalled into service, including the ISS Enterprise, ISS Defiant and the ISS Excelsior. Also using stolen plans from the primary universe, the Empire was able to replicate a Sovereign-class vessel, the ISS Pioneer. 

Star Trek: Shattered Universe
In 2293, Captain Sulu and the crew of the USS were transported aboard the ISS, where they were pursued by Commander Chekov on the ISS 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. He was sent on a mission to protect the upcoming Empress aboard the ISS and ISS 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 as well. (Star Trek: Shattered Universe)

USS Saipan - Dark Mirror
In this RPG universe 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 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. (USS Saipan - Dark Mirror)

Tales of the Mirror Universe
Part of the fan fiction universe of Star Trek: Special Operations, TMU is an anthology series showing mirror versions of characters from Special Ops. To date only two stories have been posted. "The Mirror Cracked" deals with Special Ops lead character Scott Freeman joining the Terran rebellion. "Phoenix Rising" features mirror versions of the cast of the Intelligence Strike Team series attempting to capture mothballed Imperial starships. Seven further stories were planned, but this was recently reduced to three. The stories are based on events seen in the TV episodes and the Pocket Books volumes ' and '.

Technology

 * Agonizer
 * Agony booth
 * Multidimensional transporter device
 * Tantalus field
 * Tri-cobalt warhead

Starships

 * See also: mirror universe starships.


 * Defiant
 * USS
 * ISS
 * ISS
 * ISS Avenger (NX-09)
 * Regent's flagship
 * Terok Nor (mirror)

Related topics

 * Mirror universe cultures
 * Mirror universe people
 * Mirror universe starships