"The Changeling" was the 47th episode of Star Trek: The Original Series, the 8th episode of the show's second season, first aired on 29 September 1967. The episode was written by John Meredyth Lucas, directed by Marc Daniels and novelized in Star Trek 7 by James Blish.



Episode charactersEdit

Clifford Brent (?) • CarlisleChristine ChapelBill HadleyJames T. KirkRoger LemliRyan LeslieLeonard McCoyNomadMontgomery ScottHayden SinghSpockHikaru SuluNyota UhuraVinci
Referenced only 
ManwayJackson RoykirkTan Ru

Novelization charactersEdit

Christine ChapelJames T. KirkLeonard McCoyNomadMontgomery ScottHayden SinghSpockHikaru SuluNyota Uhura
Referenced only 
Jackson Roykirk

Starships and vehiclesEdit

USS Enterprise (Constitution-class)

Races and culturesEdit

Referenced only 

States and organizationsEdit


Science and technologyEdit

anatomyarmatmospherebloodfingergashumanoidlifeformmatterorbitoxygenspacestarstarshipSymbalene blood burnuniverseviewscreen

Ranks and titlesEdit

captaincommandercommanding officercommunications officerFederation Starfleet ranksFederation Starfleet ranks (2260s)first officerlieutenant commanderofficerscientistscience officer

Other referencesEdit

Beyond AntaresbootclothingFederation membersfive-year missiongovernmentlanguagelogicmemorynation-statepantsquadrantraces and culturesrankstardateStarfleet uniformStarfleet uniform (2260s)technologytitletunicuniformweapon


Related mediaEdit

Jackson Roykirk later appeared in the following adventures:




published order
Previous episode:
Wolf in the Fold
TOS episode produced Next episode:
The Apple
Previous episode:
Who Mourns for Adonais?
TOS episode aired Next episode:
Mirror, Mirror
Previous story:
Who Mourns for Adonais?
Star Trek 7
Next story:
The Paradise Syndrome
chronological order
Previous Adventure:
Across the Universe
Pocket Next Adventure:
See No Evil
Previous Adventure:
Wolf in the Fold
Voyages of the
USS Enterprise (NCC-1701)
(2264 to 2270)
Next Adventure:
The Apple

External linksEdit

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