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Captain to Captain is a Star Trek: The Original Series novel by Greg Cox. It is the first novel in the Legacies trilogy, and was released on 28 June 2016.


An epic new trilogy begins—a tie-in for the milestone fiftieth anniversary of Star Trek: The Original Series—that stretches from the earliest voyages of the starship Enterprise to Captain Kirk's historic five-year mission… and from one universe to another!
Hidden aboard the USS Enterprise is a secret that has been passed from captain to captain, from Robert April to Christopher Pike to James T. Kirk. Now the return of the enigmatic woman once known as Number One has brought that secret to light, and Kirk and his crew must risk everything to finish a mission that began with April so many years ago...
Nearly two decades earlier, April and his crew first visited the planet Usilde, where they found both tragedy and a thorny moral dilemma. Today, the legacy of that fateful occasion will compel Kirk to embark on a risky voyage back to that forbidden world — which is now deep in territory claimed by the Klingon Empire!


The Enterprise's former first officer Number One, now captain of the USS Yorktown comes aboard but immediately steals a Transfer Key which has been held in the custody of the Enterprise captain without the knowledge of Starfleet Command for eighteen years, then flees the ship.

During Captain April's command, when Number One was a young lieutenant, the Enterprise crew discovered that the pre-industrial civilisation of the Usildar had been enslaved by alien invaders, the Jatohr. The Jatohr had crossed over from another universe to escape a catastrophe. Used to being the only sentient species in existence, they sought to bring all other life under their control. Eljor, the scientist responsible for creating the transfer process, allied himself with April and Number One and, although killed in the process, managed to transfer all the other Jatohr back to their own universe, then entrusted the key to them. However, during the course of the mission, nine Enterprise crewmembers, including all the other members of an away team Number One led, were left stranded in the other universe.

Number One is returning to Usilde in the hope of using the equipment to recover the missing crewmembers. The Enterprise follows and Kirk and Spock, the only crewmembers aware of the key's assistance, beam down. They agree to help Number One, but Usilde is now in territory claimed by the Klingons, who are on their way. When they are unable to immediately locate the missing crew, Number One transfers herself to the other universe to search for them, asking Kirk and Spock to come back for her in sixty days. The pair manage to evade the Klingons and return to the Enterprise with the Transfer Key. However, Kirk's new yeoman is a Romulan agent and absconds with the key.



USS Enterprise personnel (2249)

Robert AprilJames CambiasDylan CraigCeleste DarcelCarlos FloridaBruce GoldbergGriffinIngrid HolstineLe MayRaul MartinezNumber OneSarah Poole-AprilMichelle RobertsSpirit Claw SanaweyTim ShimizuLorna SimonCheryl Stevens

USS Enterprise personnel (2267)

Lisa Bates/SadiraBreslerPavel ChekovJames T. KirkJohn KyleCharlene MastersLeonard McCoyKevin RileyMontgomery ScottSpockHikaru SuluNyota Uhura

Jatohr and Usildar


Other characters

Referenced only
Robert April (mirror)Dona CestrixEmmettG'SissolJames T. Kirk (mirror)Kodos the ExecutionerFerdinand MagellanGary MitchellN'BrullusJ. Robert OppenheimerChristopher PikeJanice RandSpock (mirror)Vina

Starships and vehicles

IKS Ch'TangUSS Enterprise (Constitution-class) • Jatohr podShimizu (courier) • ChR Velibor (Romulan bird-of-prey)
Referenced only
Class J starshipUSS ConstellationUSS Farragutfighter jetChR Gal Gath'thongUSS Yorktown


Federation-Klingon Neutral ZoneJatohr citadelKorinar sectorLibros (Libros ILibros III/Usilde)
Referenced only
Chelana IIChippewa PrimeEarth (Amazon basinBroken BowSan FranciscoSan Francisco Fleet YardsStarfleet Headquarters) • Illyrialistening postMemory AlphaMirror universeNova AmazoniaOctaro IIRavenna IIIRomulan Neutral ZoneSkalhem IVSofya VStarbase 11Talos IVTarsus IVTennek VITycho IVVulcanZebulus Major

Races and cultures

Human (ApacheRussian) • IllyrianJatohrKlingon (QuchHa') • RomulanUsildar (Winding Waters) • Vulcan
Referenced only

States and organizations

Klingon EmpireRomulan Star EmpireStarfleetTal ShiarUnited Federation of Planets
Referenced only
Federation Diplomatic CorpsStarfleet AcademyStarfleet CommandStarfleet Intelligence

Science and technology

adrenalineannular confinement beamarborealartificial gravityastrogatoraxisbiologyblack starbrand energy differentialbrightness filtercapacitorcephalopodchronometerClass Mcloaking devicecloaking fieldcommunicatorcomputercoppercosmic string entanglementCygnian measlesdata slatedeflector shielddelta raysdilithiumdisruptorduraniumecologyelectrolyteexoskeletonfourth dimensionfrequencyfungusG-forcegasgas giantgastropodgravitongravity wellharmonichectarehelmhemocyaninhemoglobinhologramholographic imaging tankimpulse engineinertial dampenerion stormion trailkilometerlaserlaser pistollife supportlog buoymain-sequence starmattermatter-antimatter containmentmetermetric tonmicrotapemind-sifterminingmoonmultiversal currentmultiversenacelleneutroniumnitrogenoxygenpalm beaconparsecphaserphoton grenadephoton torpedophylogenyplanetplanetary nebulaplanetoidplasmapolarityquantum echoquantum geographyred giantRigelian feversensorshuttlecraftslingshot effectsonic showerstellar cartographystun-globesubspace field coilsubspace radioTantalus fieldterraformingtheremintime barriertime traveltontractor beamtransfer fieldtransfer-field generatorTransfer Keytransparent aluminumtransportertri-ox compoundtricorderturboliftuniversal translatorvelocityviewscreenwarp corewarp drivewarp factorwhite dwarfzero gravity

Ranks and titles

ambassadorambassador-at-largeassassinbiologistbureaucratcaptainchiefchief engineerchief medical officercommandercommodorecommunications officercyberneticistemissaryensignfirst officerFirst ScientistgymnasthelmsmanHigh Rangerinterrogatorlieutenantlieutenant commandermajornavigatorPraetor of the Romulan Star Empireprofessorrefugeescience officerscientific advisorsecurity chiefsentryseraphSurveillance Deputytechnicianterroristtransporter chiefveterinarianyeoman

Other references

19672249226720th centuryAetherian seraphairfieldalgaeAltair waterantennaeAntosian puff pastriesasteroidavalancheaxeBabel Conferencesbackpackbarkbarnaclebasketbatonbattering rambinocularsblossombootsbranchbreastplatebridgebromeliadbulkheadcactuscanopycantaloupecarryallcementclasperclubcoffeecreamcropcuttlefishdeforestationdéjà vuDenevan bloodhounddiplomacydormitorydragonflydress uniformEarth-Romulan Wareffigyevasive maneuversfarmfive-year missionflutefrondfungusgourdgreenhousegrizzly beargymnasiumhangarhatchethawkhermaphroditeIllyrian mangoinsectlabor camplanding partylavaleaflichenLudditemacemachetemanaclesmelonmoldmolluskmossmugatomuseummushroomnautilusnerve pinchoarofficer's messoperations centerorangutanOrganian Peace TreatypalacePeleian magmaphilePiklite tiger trappirate fleetpower plantPrime Directivepunchbowlquartersraftrain forestrationred alertredwoodRigelian caviarringriversapsawscotchscuba gearscuttlebuttseatbeltsexualityshedshrubsea shellsickbaysiloskeleton keyslingshot effectslime devilslingsnakespearspidersquidstardateStarfleet uniform (2240s-2265)Starfleet uniform (2265-2270)stoneStone AgestylussugarT'Wispian marshestentacletheremin concertthicketTime of AwakeningtranyatreeVenusian karaokewaldoeswaterwhite-water raftingwoodWorld War IIIyearyellow alert



Published Order
Previous novel:
Elusive Salvation
TOS novel Next novel:
Best Defense
Previous story:
Stories by:
Greg Cox
Next story:
The Antares Maelstrom
Chronological Order
Previous adventure:
The Hollow Crown, Issue 1
Memory Beta Chronology Next adventure:
The Mirror, Cracked
The above chronology placements are based on the primary placement in 2267.
The Memory Beta Chronology places events from this story in 1 other timeframe(s):
Previous adventure:
Best Destiny
2 October 2249
Chapters 5-14
Next adventure:
Chapter 12, 1st entry

External link