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"Elaan of Troyius" was the 57th episode of Star Trek: The Original Series, the 2nd episode of the show's third and final season, first aired on 20 December 1968. The episode was written and directed by John Meredyth Lucas and novelized in Star Trek 7 by James Blish.



Episode characters

Christine ChapelPavel ChekovElaanEvans (Lieutenant)Bill HadleyKhodJames T. KirkKrytonRoger LemliRyan LeslieLeonard McCoyPetriMontgomery ScottSpockHikaru SuluNyota UhuraVinci[1]Watson (engineer)unnamed Elasiansunnamed USS Enterprise (NCC-1701) personnel

Novelization characters

Christine ChapelPavel ChekovElaanEvans (Lieutenant)KhodJames T. KirkKrytonLeonard McCoyPetriMontgomery ScottSpockHikaru SuluNyota UhuraWatson (engineer)

Starships and vehicles

USS Enterprise (Constitution-class heavy cruiser) • Khod's warship (D7-class)


ElasTroyius (Tellun system, Milky Way Galaxy)
Referenced only

Races and cultures


Technology and weapons

starshipviewscreendilithium crystal converter assembly

Materials and substances

atmospherebloodgasoxygenElasian tearscolladium trioxidedilithiumalgobariumhydrogenSaurian brandy

States and organizations

FederationStarfleetElasian Council of NoblesStarfleet CommandKlingon EmpireTroyius Tribunal

Ranks and titles

captaincommandercommanding officercommunications officerFederation Starfleet ranksFederation Starfleet ranks (2260s)first officerhigh commissionerlieutenant commanderofficerscientistscience officerDohlmanmechanicbureaucrat

Other references

anatomyarmbootclothingFederation membersfingerfive-year missiongovernmenthumanoidlanguagelifeformlogicmattermemorynation-stateorbitpantsquadrantraces and culturesrankspacestarstardateStarfleet uniformStarfleet uniform (2260s)technologytitletunicuniformuniverseweaponclass A security • "Bones" • general quarterskilometerspankingsuicideswineVulcan mind meldyellow alert


Related media




published order
Previous episode:
Spectre of the Gun
TOS episode produced Next episode:
The Paradise Syndrome
Previous episode:
The Empath
TOS episode aired Next episode:
Whom Gods Destroy
Previous story:
The Deadly Years
Star Trek 7
Next story:
last story
chronological order
Previous Adventure:
Spectre of the Gun
Pocket Next Adventure:
The Paradise Syndrome
Previous Adventure:
Spectre of the Gun
Voyages of the
USS Enterprise (NCC-1701)
(2264 to 2270)
Next Adventure:
The Paradise Syndrome

External links

  1. This character was not named in the episode but the same actor, wearing the same operations division Starfleet uniform, was addressed as Vinci in TOS episode: "The Devil in the Dark". The same actor also played the character of Clifford Brent.