Memory Beta, non-canon Star Trek Wiki
Memory Beta, non-canon Star Trek Wiki

"Turnabout Intruder" was the 79th episode of Star Trek: The Original Series, the 24th and final episode of the show's third and final season, first aired on 3 June 1969. The episode was written by Gene Roddenberry and Arthur H. Singer, directed by Herb Wallerstein and novelized in Star Trek 5 by James Blish.


A self-hating woman and ex-lover of James T. Kirk has a double revenge: switch consciousnesses with Kirk and then kill Kirk in her "old body"!



Episode characters[]

Christine ChapelPavel ChekovArthur ColemanDavid GallowayBill HadleyJames T. KirkRoger LemliJanice LesterLisaLeonard McCoyMontgomery ScottSpockHikaru Suluunnamed 2260s USS Enterprise personnel

Novelization characters[]

Christine ChapelPavel ChekovHoward ColemanJames T. KirkJanice LesterLeonard McCoyMontgomery ScottSpockHikaru SuluNyota Uhura

Starships and vehicles[]

USS Enterprise (Constitution-class heavy cruiser)


Benecia ColonyBeta AurigaeCamus IIStarbase 2

Races and cultures[]


Technology and weapons[]


Materials and substances[]


States and organizations[]


Ranks and titles[]

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

Other references[]

anatomyarmbootclothingFederation membersfingerfive-year missiongovernmenthumanoidlanguagelifeformlogicmattermemorynation-stateorbitpantsquadrantraces and culturesrankspacestarstardateStarfleet uniformStarfleet uniform (2260s)technologytitletunicuniformuniverseweapon


Related media[]

This episode is later referenced in the TOS novel, Assignment: Eternity, as the novel takes place a week after this episode.

The Star Trek: Enterprise novel What Price Honor? implies that the mind-swapping technology seen in this episode comes from a race called the Anu'anshee.


Video releases[]


Episode images[]

Adaptation images[]



published order
Previous episode:
All Our Yesterdays
TOS episode produced Next episode:
last episode produced
Previous episode:
All Our Yesterdays
TOS episode aired Next episode:
The Cage
Previous story:
This Side of Paradise
Star Trek 5
Next story:
Requiem for Methuselah
chronological order
Previous Adventure:
Faces of Fire
Memory Beta Chronology Next Adventure:
Captain's Personal Log
Previous Adventure:
Faces of Fire
Pocket Next Adventure:
Assignment: Eternity
Previous Adventure:
All Our Yesterdays
Voyages of the
USS Enterprise (NCC-1701)
(2264 to 2270)
Next Adventure:
Captain's Personal Log

External links[]