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This page details Ezri Dax in the primary universe; for the Ezri Dax in the mirror universe see Ezri Dax (mirror); for the Ezri Dax in the First Splinter timeline ended by the Devidian temporal apocalypse, see Ezri Dax (1ST); for the Ezri Dax in all other alternate universes see Ezri Dax (alternates).

Ezri Dax was a joined Trill woman, born as Ezri Tigan on the world of New Sydney in the year 2354. Ezri started her Starfleet career as an assistant counselor aboard the USS Destiny, up until she was joined with Dax. Ezri was later assigned to Deep Space 9, the original USS Defiant and its successor. states that Ezri was born on Trill. However, this contradicts an on-screen personnel file and episodic continuity.


Early life

Ezri's mother, Yanas Tigan, was the owner of a very successful mining concern on the world of New Sydney. Ezri and her mother, who wanted Ezri to help run the family business, argued constantly.

Ezri refused to let her mother control her the way she did her two brothers and refused to join the family business. Instead, she enrolled in Starfleet Academy and studied to become a counselor. (DS9 episode: "Prodigal Daughter")

Joining with Dax

Ezri attended Starfleet Academy Medical School from 2372 to 2374, focusing on psychology. Her final year of training was waived. (ST website:

In late 2374, Ezri held the rank of ensign and served as assistant counselor aboard the starship USS Destiny. In that year, the Destiny was diverted because of a medical emergency and traveled to Deep Space 9. Upon arrival, the Destiny docked with a runabout that contained the Trill symbiont, Dax, who had been separated from its previous host, Jadzia. Jadzia Dax had been brutally murdered by Cardassian Gul Skrain Dukat, with the assistance of a Pah-wraith. The Dax symbiont was escorted by DS9's chief of security, the Changeling, Odo. Dax needed to a new host in a matter of weeks or it wouldn't survive. When a shape-shifting Founder of the Dominion impersonated Ezri's lover, Ensign Brinner Finok, and attempted to kidnap the Dax symbiont, Ezri was the first to realize that something was wrong. Soon after the foiling of the kidnapping and the capture of the Changeling, the ship was attacked by Jem'Hadar vessels. Dax's condition worsened, and needed to be joined immediately. Ezri had never wanted to be joined, but as Brinner Finok was still missing, Ezri was the only available Trill to join Dax with. Ezri agreed to undergo the joining procedure, and became the ninth host of the Dax symbiont, Ezri Dax. Brinner Finok would later be found safe in a medical supply closet, but their relationship did not continue after Ezri's joining. (DS9 episode: "Tears of the Prophets"; DS9 - The Lives of Dax short story: "Second Star to the Right...", "... And Straight on 'til Morning")

Deep Space 9


Ezri in 2375.

Ezri, confused by all of her new memories, sought out the one constant in her previous two incarnations—Starfleet Captain Benjamin Sisko, on Earth. Dax's host Ezri initially preferred not to be called "Old Man" by her new mentor and longtime friend, Ben Sisko. (DS9 episodes: "Image in the Sand", "Shadows and Symbols", "Afterimage")

Dax returned to DS9 with Sisko where she received the rank of lieutenant junior grade and position of station's counselor. She served in the position through the end of the war. (DS9 episodes: "Image in the Sand", "Shadows and Symbols")

After "returning" to DS9, she began counseling Elim Garak for his claustrophobia. After some time and work, they discovered his attacks were triggered by his guilt for helping the Federation attack Cardassian targets. (DS9 episode: "Afterimage")

Ezri fought in the Siege of AR-558. (DS9 episode: "The Siege of AR-558")

Just prior to the end of the war in 2375, Ezri began a relationship with Doctor Julian Bashir, who may have had unresolved feelings for her previous host, Jadzia. (DS9 episode: "The Dogs of War")

Alternate realities

In the First Splinter timeline, Ezri Dax became a captain and played a pivotal role in fighting the Borg Invasion of 2381 and the Devidians' temporal apocalypse. (Coda)

During Kira Nerys' vision from the Prophets, Ezri was represented by a woman named Zeir. (DS9 novel: Warpath)

Starfleet service record

location assignment dates rank or rate assignment insignia rank insignia
Starfleet Academy student officer 2372-2373 cadet Assignment badge. Uniform collar rank insignia image.
2373-2374 Uniform collar rank insignia image.
USS Destiny assistant counselor 2374-2375 ensign Uniform collar rank insignia image.
Deep Space 9 counselor 2375-2376 lieutenant junior grade Uniform collar rank insignia image.
USS Defiant II first officer from 2376 lieutenant Uniform collar rank insignia image.
Deep Space 9 communications officer / second officer from 2376



Preceded by:
Host of Dax
from 2375
Succeeded by:
unestablished, eventually Dax
hosts of the Dax symbiont
primary universe Lela YuraniEnjana* • Penzak* • Tobin FendusEmony OdarenDax (Ensign)* • AudridToriasJoran BelarCurzon AntraniJadzia IdarisVerad Kalon* • Ezri TiganDax (Enterprise-J captain) Trill icon image. Symbiosis Commission icon image.
First Splinter timeline Jadzia IdarisEzri Tigan
other alternate timelines Jadzia IdarisEzri TiganTornellenYedrin
mirror universe Curzon AntraniJadzia IdarisEzri Tigan
USS Destiny personnel
Emblem of the United Federation of Planets Brinner FinokFulghumBilly JamisonJona MeelJohn MacAfeeMarcia MacAfeeRaymerFranklin SolonEzri TiganT'pek Seal of the Federation Starfleet
Starbase Deep Space 9 personnel and residents (original station)
station personnel K. AdabweM. AhzedT. AimatsuAleco V.R. AlfonzoAlle T.AltmanAmranK. AndrewsT. AneN. AponteJ. AsheAylam E.J. S. BashirBattes A.BileckiJ. BlackmerP. BoudreauxS. BowersJ. BroomeCardokCarltonS. CarsonCenn D.J. ChaoJ. ChavezH. CollinsF. CortezCostelloCryanD. CzirakyG. DavisE. DaxJ. DaxDevroS. DouglasM. EddingtonEddonEtana K.Evik N.Gaysd T.Girani S.GoodmanGordimerGreskrendtregkGueretteHageHava R.T. JastJataq'qatS. JonssonKaboKahrimanisKellyKira N.V. KnezoJ. KurlandKurnT. KwiatkowskiS. ch'LarnC. LingP. MatthiasMcCormickMcEwianK. MerimarkMonyodinT. MooreMoruI. MuckerheideMunsonNalan B.J. Si NaranNedani I.Nev R.NguyenNogM.E. O'BrienOccinoOdoD. ParksPertweeH. PetersenPhongsitG. PrimminRedacch'RellenK. RichterRo L.RomG. RonessSangerSarish M.A. SelznerJ. SenkowskiSetrin Y.R. th'ShantShul T.Shula S.SimakB.L. SiskoZ. SlaineJ. SmithN. SthiliW. StinsonM. StrangStrekC. SwannigTaganaS. TaranS. TarsesA. TaverasDarl TavrosTelnorriP. TenmeiTerekT. ch'ThaneTollandM. TomsonT'PeynTrulliE. Vaughnzh'VeskVu K.Wasa G.Wayeh S.D. WilkensWorfWoros K.YamaguchiD. YarrowYevlin M. Emblem of the United Federation of Planets. Bajoran emblem.
Seal of the Federation Starfleet. DS9 insignia.
station residents AluuraA. WyossL. ArlinAriosBarys K.Betenn B.Betenn C.Betenn K.BokatBrocBroikBylaCadaraCaprilChalan A.Chon S.ChramConpapDalba S.DrakV. FontaineA. FontanaFreylaFroolE. GarakGrimpE. GrofHadronHatram N.HetikJas-qalJhakkaKagaKalawLeetaLondar P.MaikiMalor B.Malor T.MardahMartokMirehMo'NekeMornM'PellaKeiko O'BrienKirayoshi O'BrienMolly O'BrienQuarkRasmus S.RhitSardaS'taassN. SardopolousShul AbaJ. SiskoT'AraTaran'atarJ. TharenTigart H.Tir R.Tora Z.TreirVisshKasidy Yates
Starbase Deep Space 9 personnel and residents (second station)
station personnel Aleco V.AllasarE.g. AnsargJ. BashirB. BecerraV. BixxJ. BlackmerP. BoudreauxJ. CandlewoodCardokCenn D.H. CollinsJ. CollinsB. CrusherA. d'ArnaudV. deGromO. DellasantG. DesjardinsEtana K.S. DouglasHava R.B. HerriotE. JuarezV. KnezoS. ch'LarnP. MatthiasK. MerimarkE. MinnarNogM.E. O'BrienD. PhloxS. RavidK. RichterRo L.N. SaygurShul T.Z. SlaineW. StinsonT'LuneP. TenmeiL. ThorneValinarVerlonR.K. VissP. WalenistaZhang S.
station residents Altek D.AluuraBroikDamas H.FroolGrimpKala M.M'PellaOrcamQuarkShmengeUlu L.Zirk
Defiant personnel
USS Defiant (NCC-1764) T. BarrowsT. BlairS. GarrovickJ. HamiltonK. MbuguaC. NynR. SabapathySerlingT. ShullStevokE. SutherlandT'LehrM. Willoughby UFP emblem image. Starfleet emblem. Assignment patch image.
USS Defiant (NX-74205) (I) AbdabaT. AmarV. AaastaakArla R.J. BashirH. BlakeBremertonS. CarsonClarkE. DaxJ. DaxM. EddingtonH. IlarioJoson W.KellyKira N.KizilbashKolettaMeyerE. MuñizN'Kduk-ThagNogM. O'BrienOdoReeseP. ReeseK. RichterB. SiskoF. StevensR. TannenbaumT'RulC. L. M. D. C. TelTutuT. WeymouthJ. WheelerWorf
USS Defiant (NCC-75633) (II) Aleco V.J. BashirBoehmS. BowersJ. CandlewoodCassiniCelesteJ. ChaoE. DaxG. ForteD. GervasiGordimerQ. HeinsK. HunterT. JastE. JuarezKira N.J. KurlandLankfordM. LeishmanA. McCallumK. MerimarkMinecciM'NokC. MooreL. NeeleyNogM. O'BrienOdoB. PermenterT. RahimK. RichterG. RonessJ. SenkowskiB. SiskoN. SthiliStovP. TenmeiT. ch'ThaneThronT'rbVanBuskirkE. VaughnWorfA. Zucca
mirror universe ISS Defiant (Constitution-class)
Terran Empire
Imperial Starfleet
J. ArcherKelbyT. MayweatherPhloxM. ReedA.G. RobinsonH. SatoT'PolC. Tucker Terran Empire emblem.
Terran Rebellion
Galactic Commonwealth
J. BashirS. BowersE. DaxJ. DaxA. DeCurtisLeetaE. MuñizM. O'BrienPennakB. SiskoStevensP. TenmeiT. ch'Thane Terran emblem.


  • Ezri Dax was portrayed by Canadian actress Nicole de Boer in Star Trek: Deep Space Nine from 1998-1999. De Boer was pleased with Ezri's promotion to captain, having been given a copy of a novel by David Mack. She commented: "Just the fact she got to captain – I mean, that is pretty cool – and it does make sense for Ezri because she was on that sort of trajectory. She was growing. I would have liked to have had a little longer on the show to become even more confident. What would be cool is if we did another show and you did see me walk through the doors with wonderful confidence because she was so lost before. And they [the other characters] would be like, 'Whoa! That’s Ezri! She’s really grown a lot'. But then we could also see how those people inside her have manifested in interesting ways now that she’s really grasped how to do it. That would be really fun just to explore all that stuff but with more confidence than I could at the time because it was brand-new for her".[1]
  • In the post-finale "season eight" segments of the documentary What We Left Behind, Ezri commands the USS Emmett Till.

Appearances and references



External links