Memory Beta, non-canon Star Trek Wiki

A friendly reminder regarding spoilers! At present the expanded Trek universe is in a period of major upheaval with the finale of Year Five, the Coda miniseries and the continuations of Discovery, Picard and Lower Decks; and the premieres of Prodigy and Strange New Worlds, the advent of new eras in Star Trek Online gaming, as well as other post-55th Anniversary publications. Therefore, please be courteous to other users who may not be aware of current developments by using the {{spoiler}}, {{spoilers}} or {{majorspoiler}} tags when adding new information from sources less than six months old. Also, please do not include details in the summary bar when editing pages and do not anticipate making additions relating to sources not yet in release. 'Thank You


Memory Beta, non-canon Star Trek Wiki
For the primary universe counterpart, see USS Enterprise (NCC-1701).

In the mirror universe, the ISS Enterprise (NCC-1701) was a 23rd century Terran Empire Constitution-class cruiser starship in the service of the Imperial Starfleet. This Enterprise exists in a parallel universe that is somehow connected to ours. During an ion storm in 2267, a landing party from the USS Enterprise of the primary universe was transported to this mirror version of their own starship. (TOS episode & Star Trek 3 novelization: Mirror, Mirror)

Over a century after the initial crossover, Jean-Luc Picard referred to the ship as "the fabled ISS Enterprise". (TNG - Mirror Universe novel: The Worst of Both Worlds)


The ISS Enterprise of the Imperial Starfleet was almost identical in configuration to a Federation Constitution-class heavy cruiser of the 2260s, and bears the same registry, NCC-1701, as the USS Enterprise. However, many minute details distinguished it such as the dagger emblem of the Terran Empire painted on the doors, and the posting of armed soldiers in the corridors. (TOS episode & Star Trek 3 novelization: Mirror, Mirror)

Two inconsistencies with canon exist with the registry of the mirror Enterprise. In the TOS - Star Trek 3 novelization: Mirror, Mirror, the ship is referred to as the "ESS Enterprise"; in the TNG novel: Dark Mirror, the Enterprise is given the registry number ICC-1701.


While under the command of Captain Robert April, the Enterprise led the invasion of Bolarus. (Decipher RPG module: Through a Glass, Darkly)

The Enterprise was commanded by Captain Christopher Pike during the 2250s and early 2260s. During this time, the Enterprise encountered the Talosians and Pike was captured. During his imprisonment, the Talosians learned that the Empire feared telepathy and eliminated all species that showed the slightest hint of possessing it. This led the Talosians to return Pike to the Enterprise to act as their spy within the Empire. This broke Pike and led him to become an alcoholic who frequently made mistakes that endangered the ship. Eventually, Pike was assassinated by James Kirk, using the Tantalus device and with the assistance of Spock. (TOS - Mirror Universe short story: "The Greater Good")

Once under Kirk's command, the Enterprise participated in the quelling of the Gorlan uprising, and in 2267 was ordered to destroy the Halkan civilization. (TOS episode: "Mirror, Mirror")

References from numerous sources establish that the various depictions of the mirror universe may not take place in concurrent timelines, meaning there could be a number of divergent alternate reality versions of this topic that do not share the same continuity. The references below this note are separated into subsections to minimize confusion regarding the divergences.

Star Trek: Mirror Universe continuity

In early 2267, the Enterprise visited Argelius II where Chief Engineer Montgomery Scott was suspected of several murders, however Kirk protected his engineer from the authorities there and the ship departed. After the events of the "crossover" incident, Spock assassinated Kirk and became the new captain of the Enterprise. In 2268, the Enterprise carried several Imperial ambassadors, including Spock's father Sarek, to Babel where, in a shocking move, Coridan joined the Terran Empire through diplomatic methods as opposed to the expected invasion and occupation. Later that year the Enterprise successfully captured and towed a Romulan Bird-of-Prey to Starbase 10 . The Enterprise later took part in the testing of the M-5 computer during which a 'malfunction' caused the ISS Excalibur to fire upon the Enterprise, damaging it and causing the deaths of twelve with seventeen wounded; the incident was later believed to be a trap set by Grand Admiral Garth of Izar to assassinate Spock. Later, the Enterprise was ambushed by Garth himself at Elba II in another unsuccessful attempt to kill Spock and his crew.

The Enterprise underwent a significant refit in 2270, altering nearly every aspect of the ship. In 2277, the Enterprise was named flagship of the Empire after Admiral Spock ascended to the rank of Grand Admiral after murdering Grand Admiral Matthew Decker, foiling a plot by the Empress to have him killed. In this capacity, the Enterprise also replaced the ISS Constellation, in this role. The Enterprise was later placed under the command of Kevin Riley, a position which he held until 2287, after Spock's rise to Emperor. In 2293, the Enterprise now under the command of Captain Saavik transported the Emperor and his staff to the negotiations on Khitomer between the Terrans, Klingons, Romulans and Cardassians. The fate of the ship during the Klingon-Cardassian invasion is unknown. However, she was presumed destroyed. (TOS - Mirror Universe novel: The Sorrows of Empire)

New Frontiers

In one version of events, the mirror Spock chose to disregard the primary universe Kirk's advice, deducing he could not change the course of the Empire alone. By 2285 the Enterprise, still under the command of Kirk, had under gone a refit similar to its counterpart and crossed into our universe as a prelude to the Empire's invasion. The Enterprise confronted the USS Excelsior which was transporting the crew of the USS Enterprise back to Earth following the events at the Genesis Planet. The Terran vessel managed to disable and then board the Excelsior, however, the primary Enterprise crew were able to escape and take control of the ISS Enterprise. The mirror universe Kirk realizing this remotely destroyed the ship, however the primary crew managed to separate the saucer section and escape. (TOS - The Mirror Universe Saga comic:[citation needed])


See ISS Enterprise (NCC-1701) personnel.

Crew manifest

  • Commanding officer:
    • Captain Robert April (2245-2250)
    • Captain Karl Franz (2250-2251)
    • Captain Christopher Pike (2251-2266)
    • Captain James T. Kirk (2266-2267)
    • Captain/Admiral Spock (2267-2270)
    • Captain Willard Decker (2270-2271)
    • Admiral/Grand Admiral Spock (2271-2277)
    • Captain Kevin Riley (2277-2287)
    • Captain Saavik (2287-2293)
    • Captain Xon (2293-2295)
  • First officer:
    • Christopher Pike (2250-2251)
    • Number One (2251-2264)
    • James T. Kirk (2264-2266)
    • Spock (2266-2267)
    • Montgomery Scott (2267-2271)
    • Willard Decker (2271-2277)
    • Kevin Riley (2277-2277)
    • Saavik (2277-2287)
    • Xon (2287-2293)
  • Second officer:
  • Science officer:
    • Spock (2254-2267)
    • Xon (2277-2287)
  • Chief engineering officer:
  • Helm:
    • Hikaru Sulu (2264-2267)
    • Ensign/Lieutenant Sean DePaul (2267-2277)
    • Ensign Saavik (2277-2277)
  • Security Chief:
  • Navigator
    • Pavel Chekov (2266-2267)
    • Kevin Thomas Riley (2267-2270)
    • Ilia (2270-2272)
  • Communications officer:
  • Chief Medical officer:
    • Doctor Leonard McCoy (2266-2269)
    • Doctor Jabilo M'Benga (2269-2293)
  • Captain´s woman
    • Sarah April (2245-2250)
    • J.M. Colt (2251-2254)
    • Vina (2254-2266)
    • Marlena Moreau (2266-2269)



Ships named Enterprise
United Kingdom of Great Britain HMS EnterprizeHMS Enterprise (1774-1807) UK flag image.
United Kingdom (alternate reality) HMS Enterprise (2260s)
United States of America Enterprise (sloop-of-war)Enterprise (schooner)Enterprise (brig)Enterprise (steamboat)CV-6CVN-65OV-101 N1A US flag image.
United Earth IXS-110XCV-330NX-01 UE flag image.
United Federation of Planets Declaration-classNCC-1701NCC-1701-ANCC-1701-BNCC-1701-CNCC-1701-DNCC-1701-EChimer-classNCC-1701-FNCC-1701-J UFP flag image.
Terran Empire (mirror universes) HMS EnterprizeNX-01NCC-1701 (alternate NCC/ICC-1701)NCC-1701-ANCC/ICC-1701-DNCC-1701-ENCC-1701-F Terran flag image.
Galactic Commonwealth (mirror universe) Free Starship Enterprise Terran emblem image.
Federation (Kelvin timeline) NCC-1701 (early 23rd century)NCC-1701NCC-1701-A Emblem of the United Federation of Planets.
Federation (alternate futures) NCC-1701-DNCC-1701-FNCC-1701-JNCC-1701-∞Enterprise (distant future) UFP flag image.
United Earth (alternate realities) SS EnterpriseUESS EnterpriseESS Enterprise UE flag image.
Federation (other alternate realities) FSS EnterpriseUS EnterpriseUSS EnterpriseUSV EnterpriseUSS Enterprise-E UFP flag image.
Interstellar Coalition (alternate reality) ICV Enterprise
Interstellar Union
(alternate timeline)
IUES Enterprise I Seal of the Interstellar Union.
(alternate timeline)
USS Enterprise (NCC-2101) Earthfleet logo.
Early series of Constitution-class class I/class XI heavy cruiser starships
Federation, Starfleet built to mk I specifications ConstellationConstitutionDefiantEndeavorEnterpriseExcaliburExeterFarragutHoodIntrepidKongoLexingtonPotemkinRepublicValiant (I)Yorktown Emblem of the United Federation of Planets. Seal of the Federation Starfleet.
various specifications AlexanderAsimovBraheConfederateEnterprise (Vardaine copy)Excalibur IIGloryIndomitableIsshasshteReuben JamesJohn F. KennedyMendelNautilusOlympus MonsOrtiseiPathfinderSurakTao FengTrexelpriseTrojanVentureZimbabwe

see also: unnamed Constitution-class starshipsExcalibur-subclass: ExcaliburTuckerExeter-subclass: Exeter-CKirkKirk-subclass (3060s refit): ArmstrongExcalibur-MNobleVesper-subclass: VesperMontrealOakland

Terran Empire, Starfleet
(mirror universe)
ConstitutionCarnageConstellationBansheeDefiantEnterpriseExcalibur (23rd century)Excalibur (Excalibur-subclass)ExeterHoodKodosLexingtonNobunagaPotemkin Seal of the Terran Empire.
23rd century subclasses: Bonhomme Richard-subclass (mk II) • Achernar-subclass (mk III) • Tikopai-subclass (mk IV) • Enterprise-subclasses (mk I-III refits)

24th and 25th century subclasses: Excalibur-subclassExeter-subclassVesper-subclass • other Constitution variants
31st and 32nd century subclass: Kirk-subclass

Enterprise-subclass (Constitution-class class XI/class XII cruiser/heavy cruiser starships)
Federation, Starfleet Ships of various specifications NCC-1335AchillesApolloBooneChristopher PikeExplorerFuriousHuntingtonIcarusIndependenceJeffersonKelleghanKirishimaLucasMusashiRauerSalazarSomersTigressVengeanceheavy cruiser (CA): Constellation IIGoebenEximerOriskanyRepublicReshadijeRamillesConstitutionEnterpriseFarragut IIrear-fire heavy cruiser (CAR): YorktownExeterIntrepid IIValiant IIPotemkinMonitorHornetMerimacEndeavourDefianceadvanced heavy cruiser (CA+): ExcelsiorHoodWaspEl DoradoAriSaratogaToriKriegerPort MoresbyPharsallusHastingsArbelaheavy drone cruiser (CAD): AgincourtBallistaBarrReprisalVulturecommand cruiser (CC): EssexExcalibur IIKongoLafayetteLexingtonheavy command cruiser (CB): AlesiaAlfeldAusterlitzBasraCannaeCoral SeaGaugamelaGettysburgGolanGravelotteInchonIsandhlwanaKadeshKhe SonKurskPanjsherRocroiRossbachSuomussalmiTannenbergThermopolaePoltavaVincennesfire support cruiser (CFS): HighwaymanKnight ErrantPaladinRangeradvanced fire support cruiser (CFS+): BerserkerCavalierFencerSamuraitactical command cruiser (TCC): Enterprise-Agalactic survey cruiser: Achernar UFP emblem. Seal of the Federation Starfleet.
Refit to mk I specification EnterpriseBismarkExcalibur IIYamatoChallengerValiant IIEssexBonhomme RichardPotemkinConstellation IIIntrepidCenturion (fm. Farragut II)LexingtonYorktownWaspForrestalRepublicAkagiRivoli Built to mk I specification ExeterDefiantHoodValley ForgeOriskanyRepublicHancockMinskYorktown
Refit to mk II specification EagleSantissima TrinidadMarseilleRadetsky Built to mk II specification ZuihoGraf ZeppelinSoryuHiryuKing George VPrince of WalesFranklinVictory IIScharnhorstGneisenauKaga IIKashimaFreidlandKonigsbergClemenceau
Refit to mk III specification KongoSaratogaEl DoradoTiconderogaKitty Hawk Built to mk III specification KearsargeBunker HillChikumaEmperadorUkraniaMarcelloFontanaJava
Terran Empire, Starfleet
(mirror universe)
ConstellationContemptibleDeceiverEnterprise (refit)Enterprise-AFarragutIntrepidNixonRelentless Seal of the Terran Empire.


The producers wanted to show the ISS Enterprise flying from right to left rather than the normal left-to-right motion of the regular version. However, the Enterprise model was only built to be filmed from one side, as the other housed supports and wires and was not detailed. The effects crew ended up using a shot where the registry decals had been redone in reverse, and 'mirroring' the film (reversing it) after the model was shot.

External link