Star Trek (1966–1969)
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Turnabout Intruder 

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


Herb Wallerstein


Gene Roddenberry (created by), Arthur H. Singer (teleplay by) | 2 more credits »





Episode complete credited cast:
William Shatner ... Capt. Kirk
Leonard Nimoy ... Mr. Spock
DeForest Kelley ... Dr. McCoy
Sandra Smith Sandra Smith ... Janice Lester
Harry Landers ... Dr. Coleman
James Doohan ... Scott
George Takei ... Sulu
Walter Koenig ... Chekov
Majel Barrett ... Nurse Chapel
Barbara Baldavin Barbara Baldavin ... Communications Officer
David L. Ross ... Lt. Galoway
John Boyer John Boyer ... Guard


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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TV-PG | See all certifications »


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Release Date:

3 June 1969 (USA) See more »

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Did You Know?


Nurse Chapel's (Majel Barrett) hair color is brown for this episode, not its usual blonde color. See more »


After Dr. Lester, in Kirk's body, first arrives on the bridge and starts issuing orders, a stock wide shot of the bridge and viewing screen clearly shows Lt. Hadley, rather than Chekov, at the navigator station. At the tail end of this shot, Lester/Kirk specifically addresses his order to Chekov. In the very next shot Chekov is suddenly at the navigator station to hear the rest of Lester/Kirk's order. See more »


Dr. Janice Lester: It is mutiny! Deliberate, vindictive, insane at its base! But mutiny is charged... and encouragement to mutiny. Dr. McCoy, Mr. Scott, you heard it! On the basis of these statements, I call for an immediate vote... by the powers granted me as captain of the Enterprise. A recess is declared to be followed by a vote!
Mr. Spock: Yes, sir. An immediate vote before our chief witness can be left to die on some obscure planet with the truth locked away inside of her.
Dr. Janice Lester: Silence! You will be SILENT!
See more »

Alternate Versions

Special Enhanced version Digitally Remastered with new exterior shots and remade opening theme song See more »


Spoofed in Kim Possible: Mind Games (2002) See more »

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User Reviews

Shatner acting as a woman
4 June 2016 | by jim-01568See all my reviews

This is my really short review of Turnabout Intruder. If you are a fan of watching the William Shatner school of acting, this episode gives you a chance to see it at its best (or worst?). Basically, Shatner must act as if he is a woman, with all the negative stereotypes of a envious, deceiving revengeful female. He has to pull this off without acting too effeminate, but enough so that one can see the woman inside the man. In effect, he has to be a man inhabited by a woman. In his character as inhabited by Lester, he seems to have a possible romantic association with her partner in crime, Mr. Coleman. At one point Kirk puts his (or her) hand on Coleman's shoulder and just gives a glimpse of a man being a woman showing a certain, shall we say, physical closeness. He has to do this without looking gay. It's a very daring scene that Shatner actually pulls off. The basic story plot is not so interesting and the feminism aspect does not hold up to the passage of time. But the work of Shatner and his acting style make watching the episode worth it.

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