Star Trek (1966–1969)
24 user 6 critic

Turnabout Intruder 

Captain Kirk's insane ex-lover Dr. Janice Lester forcibly switches bodies with him in order to take command of the Enterprise.



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Episode complete credited cast:
Sandra Smith ...
Harry Landers ...
Barbara Baldavin ...
John Boyer ...


In answering a medical emergency at an archaeological expedition, Kirk confronts the deep hatred of an old love, Janice Lester, who supposedly lies severely ill from celebium radiation. In payment for jilting her back at Starfleet Academy, Dr. Lester arranges for an alien machine to swap her consciousness with that of the captain and takes command of the Enterprise. Once aboard, Kirk (in Lester's body) tries to convince Spock that he is trapped in her body. As a result, Janice (in Kirk's body) conducts a court-marshal with the intent of executing Spock and Kirk (in Janice's body), and later McCoy and Scott, to keep her secret. The crew realize something is seriously wrong with their captain and, not wishing to incur an illegal death-penalty themselves, begin a passive resistance. Written by JW Kearse

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Release Date:

3 June 1969 (USA)  »

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Aspect Ratio:

1.33 : 1
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Did You Know?


This episode was originally scheduled for broadcast on March 28, 1969. Special network coverage of the death of Dwight D. Eisenhower pre-empted it, and it didn't air until June 3. See more »


Kirk, in Lester's body, could make any number of references to the crew that Janice Lester would not know - for example, saying "Roger Korby" to Nurse Chapel. See more »


Scott: We'll have to take over the ship.
Dr. McCoy: We're talking about mutiny, Scotty.
Scott: Aye. Are you ready for the vote?
See more »


References Battleship Potemkin (1925) See more »

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User Reviews

Kirk's Insane Ex-Lover & Final Episode of S.T. TOS
14 January 2017 | by (United States) – See all my reviews

Season 3, episode 24. The Enterprise receives a distress call from planet Camus II where there are archaeological expedition is taking place. The landing party finds 3 people alive, 2 who are Dr. Janice Lester and Dr. Arthur Coleman. Janice and Kirk were once lovers during their Academy days. Janice did not receive a starship command and she blames it on the fact that she's a woman - that caused Kirk and Janice to separate. The medical scans show the survivors were exposed to radiation poisoning. Kirk and Janice are left alone for a bit to talk. Kirk learns that Janice's self hate has grown and is at the point of madness. Using an alien device, Janice traps Kirk's mind and switches bodies with him. Kirk is now in Janice and Janice is now in Kirk. The Janice-in-Kirk orders the landing party to beam aboard the Enterprise. Dr. Coleman is Janice's partner in crime. Now Kirk and crew must figure out what happened and how to get Kirk back to himself and what to do with Janice & Dr. Coleman.

A very interesting concept - to switch bodies with the opposite sex (or anyone), to get them to understand what the other has to endure - what the other's life is really like. But Janice's way, ideas and motives, is not the logical and sane way to conduct this experiment.

The heat, tension, really builds as time goes on in this final episode of Star Trek TOS. i find the lower rating on this one illogical.


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