13 September 2025

Chronology of Star Trek's Mirror Universe (episodes, novels, novellas, & short stories)

STAR TREK: MIRROR UNIVERSE

Because of the flaws in the supposed temporal mechanics of the Star Trek: Coda versus the established temporal mechanics of the Star Trek Universe, which I discussed in my take down of ‘Coda’, along with what happened in the opening teaser of “In a Mirror Darkly”, I submit that the Mirror Universe came about due to the events of Coda, and that actual Prime Universe, dubbed ‘First Splinter Timeline’ by the soulless minions of orthodoxy at Paramount, continued on past the beginning of Coda.

With the timeline erased back to 2063, there was never a CAPT Picard and USS Enterprise to go back in time and ensure that First Contact came about the way it did at the end of Star Trek: First Contact.

In this chronology, Classic Trek mixes with Nu Trek, and includes novels, novellas, and short stories from the ‘Relaunch’ Novelverse.  Yes, there is discontinuity between these various sources, but in some cases there is also at least slight (and some major) discontinuity within them.


ENT Season 1

2063

ST:ENT s04e18e19 “In a Mirror Darkly” (Teaser)
         (Vulcans make First Contact with Earth at Bozeman, Montana, after the Phoenix draws the attention of their survey ship T'Plana-Hath by reaching warp speed; instead of shaking the newcomer’s hand, the mirror Zefram Cochrane shoots him and the Terrans seize the ship)

2155

ST:ENT s04e18e19 “In a Mirror Darkly”
         (the rest of this two-part episode takes place entirely in the Mirror Universe, featuring the ISS Enterprise discovering the USS Defiant which crossed over during the events of ST:TOS “The Tholian Web”; beginning of the Terran Empire Rebellion against it, and the series of events that leads to Empress Hoshi Sato)

ST MU: Glass Empires: Age of the Empress
         (Empress Hoshi Sato I loses her throne to the Andorians when she is kidnapped by them; after she is freed by T’Pol and regains her throne, she makes Vulcans equal to Terrans)

2156

ST MU: Shards and Shadows - “Nobunaga”
         (Mirror Charles Tucker is tortured by mirror Phlox to learn the prefix code of the ISS Nobunaga, stolen by Jonathan Archer with Tucker’s help)

2248

ST MU: Shards and Shadows, “Ill Winds”
         (features mirror CAPT Robert April of the ISS Constellation and his wife mirror Sarah, inventor of the agonizer)

2256

ST:DSC s01e09 “Into the Forest I Go”
ST:DSC s01e10 “Despite Yourself”
ST:DSC s01e11 “The Wolf Inside”
ST:DSC s01e12 “Vaulting Ambition”
ST:DSC s01e13 “What’s Past is Prologue”
         (Five-part saga of the USS Discovery, commanded by CAPT Gabriel Lorca, crossing over to the Mirror Universe “accidentally” in the midst of the Klingon war, discovering the Terran Empire, counterparts of most of the crew, and the Empress in the form of Mirror Philippa Georgiou whose Prime Universe counterpart died at the Battle of the Binary Stars (ST:DSC s01e02); also that CAPT Lorca is actually Mirror CAPT Lorca, formerly of the ISS Buran.  When they finally return, minus the imposter but plus former Empress Georgiou, nine months have passed.  All are sworn to secrecy as absolute as that later surrounding the Taurus Meta-genome.)

2255 (3189)

ST:DSC s03e09e10 “Terra Firma”
         (the Guardian of Forever sends Georgiou back in time from 3189 more than a century to 2255 and over to the Mirror Universe, at the period of Lorca’s attempted coup d’etat against her, where she learns the whole truth about the plot’s full extent; the process is to synchronize her quantum signature with that of the Prime Universe; the bulk of the story takes place this year, though the framing story is in 3189, the time in which the Georgiou of the story is now from; and yes, in purely chronological terms this entry comes before the previous entry, but the Georgiou acting in the past events is the 34th century Georgiou)

2264

ST MU: Shards and Shadows - “The Greater Good”
         (with the help of Spock and Marlena Moreau, James T. Kirk of ISS Farragut assassinates Christopher Pike and Number One of ISS Enterprise and takes control of it, with Spock as first officer)

2267

ST:TOS s02e10 “Mirror, Mirror”
         (due to a transporter malfunction while beaming up to the USS Enterprise from the planet Halkan, CAPT Kirk, Dr. McCoy, LT Uhura, and LCDR Scott find themselves on the ISS Enterprise of the Terran Empire in the Mirror Universe.

2268

ST:TOS s03e09 “The Tholian Web”
         (features the disappearance of USS Defiant, NCC-1764 from a phasic anomaly near Tholian space; CAPT Kirk is caught in between phases; the Enterprise is nearly caught in a Tholian energy web waiting to rescue him)

2277

ST MU: Shards and Shadows - “The Black Flag”
         (ADM Spock’s agent T’Prynn, Taurus Reach, COMO Diego Reyes, Imperial Starbase 47, and the Shedai Wanderer)

2267-2295

ST MU: The Sorrows of Empire
         (the story of mirror Spock’s overthrow of Terran emperor James T. Kirk by murdering him, his subsequent reign during which he attempted to institute the principles of the Prime Universe’s UFP; his downfall; the conquest of the empire by the Klingon-Cardassian Alliance)

2324

Star Trek: Section 31
         (most of the action takes place in the early 24th century Prime Universe, but there are several flashbacks to Georgiou’s early life in the Mirror Universe; the antagonist of the story is, in fact, from Georgiou’s early life who has also crossed over)

2333

ST STA: Three
         (identical twins Gerda and Idun Asmund, human orphans raised as warriors on Qo’Nos, serve as helms officer and navigator aboard the Stargazer; a transporter accident results in an inhabitant of the Mirror Universe on the pad who identifies herself as Gerda Idun Asmund; action in both universes)

2340

ST MU: Shards and Shadows - The Traitor
         (back in the Mirror Universe, Gerda Idun Asmund is helmsman of the Terran Rebellion ship captained by mirror Guinan; Luc Picard saves an away team from a Klingon ambush)

2347-2348; 2372

ST MU: Obsidian Alliances - Cutting Ties
         (M'k'nzy of Calhoun, former slave of the Terran Empire, is now a slave in the mines of Remus until bought by Rojan, a Romulan business magnate, with whose half-Vulcan daughter, Soleta, he becomes involved)

2370

 

ST:DS9 s02e23 “Crossover”
         (Major Kira and Dr. Bashir accidentally cross over to the Mirror Universe  while passing through the wormhole, finding Mirror Kira Nerys as the Intendent of Terok Nor for the Klingon-Cardassian-Bajoran Alliance, Mirror Ben Sisko as her chief henchmen, and ‘Smiley’ (Mirror Miles O’Brien) as her fix-it man)

2371

ST:DS9 s03e19 “Through the Looking Glass”
         (Smiley crosses over to the Prime Universe and kidnaps CMDR Sisko to the Mirror Universe to convince Dr. Jennifer Sisko to stop working for the Alliance and, hopefully, join the Terran Rebellion)

ST MU: Shards and Shadows - “The Sacred Chalice”
         (title refers to a brothel on mirror Betazed run by Lwaxana Troi and her daughter Deanna, also features mirror versions of Luc Picard, Kestra Troi, and Lursa and B’Etor, daughters of Duras)

ST MU: Glass Empires - The Worst of Both Worlds
         (Luc Picard agrees to take an aging mirror Noonien Soong to a planet to become a human-machine hybrid, only to discover mirror Borg)

ST MU: Obsidian Alliances - The Mirror-Scaled Serpent
         (Chakotay commands a ship in the Terran Rebellion which encounters two people thrown into the Alpha Quadrant from the Delta Quadrant; also features mirrors of Neelix, Kes, B’Elanna, Tom Paris, Tuvok, Spock, Kathryn Janeway, Lewis Zimmerman, and others)

2372

ST MU: Shards and Shadows – “Bitter Fruit”
         (Tuvok and Kes try to assassinate B’Elanna after she discovers the power of telepathy)

ST MU: Shard and Shadows – “Homecoming”
         (features M'k'n'zy of Calhoun and mirror versions of Edward Jellico, Kalinda Si Qwan, Robin Lefler, Soleta, Mark Henry, and others)

ST:DS9 s04e20 “Shattered Mirror”
         (Dr. Jennifer Sisko crosses over to the Prime Universe to meet Jake, then lure him to the Mirror Universe, knowing CMDR Sisko will follow, because the Alliance needs his help to finish their Defiant)

ST MU: Shards and Shadows - “Family Matters”
         (features mirror Klag, son of M’Raq, with mirror versions of Corat Dumar, Drex son of Martok, Worf son of Mogh, Skrain Dukat, and others)

ST MU: Shards and Shadows - “Homecoming”
         (features M'k'n'zy of Calhoun and mirror versions of Edward Jellico, Kalinda Si Qwan, Robin Lefler, Soleta, Mark Henry, and others)

2374

ST:DS9 s06e08 “Resurrection”
         (in this one, all action takes place in the Prime Universe, after Mirror Bareil Antos crosses over to steal an object to take back to the Mirror Universe on behalf of Intendent Kira, who has also crossed over)

2375

ST:DS9 s07e12 “The Emperor’s New Cloak”

ST MU: Obsidian Alliances – Saturn’s Children
         (former Intendent Kira is now a slave to Martok, who has taken Worf’s former position and made Ro the new intendent, and the Terran Alliance has installed a Romulan cloak on the Defiant; starts after ST:DS9 “The Emperor’s New Cloak” and ends about here)

ST MU: Shards and Shadows – “A Terrible Beauty”
         (Keiko Ishikawa's life from working in the Alliance mines to escaping to Terok Nor and meeting Miles O'Brien)

2376

ST MU: Shards and Shadows - “Empathy”
         (Terran Rebellion ship Deanna CO William T. Riker, mirror versions of Tuvok, Christine Vale, and others)

ST MU: Shards and Shadows - “For Want of a Nail”
         (features mirror Reginald Barclay, Duras, Gowron, K’Ehleyr, and Alynna Nechayev)

2377

ST DS9: Warpath, by David Mack
         (in the aftermath of Taran’atar’s attack on Kira and Ro, Elias Vaughn and the USS Defiant chase him into the Gamma Quadrant and discover that his motives are more complex than apparent)

ST DS9: Fearful Symmetry, by Olivia Woods
         (while other events are included, the main storyline focuses on Prime Kira Nerys, Mirror Intendent Kira Nerys, Prime Iliana Ghemor who thinks she is the real Prime Kira Nerys, and the Mirror Iliana Ghemor who is still sane)

ST DS9: The Soul Key, by Olivia Woods
         (the storyline begun in the Worlds of Deep Space Nine novellas “Bajor: Fragments and Omens” and “The Dominion: Olympus Descending” and continuing thru Warpath and Fearful Symmetry finally comes to a head through direct intervention of the Prophets)

2377-2381

ST MU: Rise Like Lions
         (centers on Terok Nor and mirror Bajor, with mirror versions of Miles O’Brien, Iliana Ghemor, Ezri Tigan, Leeta, many others; tells the story of mirror Miles O’Brien leading the Terran Rebellion to victory over the Klingon-Cardassian Alliance in 2379; the victors choosing not to restore the Terran Empire but to establish the Galactic Commonwealth, headquartered on the planet Deneva*; Smiley’s retirement to Earth with Keiko Ishikawa)

2385

ST:PRO s02e19 “Cracked Mirror”
         (the reunion of the USS Prodigy with USS Voyager results in both ships ending up in the Mirror Universe, in which the Terran Rebellion has defeated the Alliance and restored the Terran Empire*)

2386

ST S31: Disavowed

         (Section 31 tasks Dr. Julian Bashir and Sarina Douglas of Starfleet Intelligence with preventing the Breen from getting a new weapon from the Mirror Universe)

* Clearly a major discontinuity issue, but see my comments above.