is "for Kirk", but Sulu and McCoy block her path. Questioned by Kirk, the woman says she is Losira, the station commander. She is alone, and her only purpose is to defend the planet from intruders. Kirk's questions unsettle her and she vanishes. Strong power emanations lead the landing party to a hidden entrance in a rock face. Passing into the hidden chamber, the landing party find a glowing computer. Three copies of Losira enter, one each for Kirk, Sulu, and McCoy. As they approach, Spock and a security officer materialize, and, at Kirk's command, destroy the computer. The three Losiras vanish. A projected image of Losira then appears on a wall, informing her fellow Kalandans that a disease has killed the station's personnel, and that the computer has been defending the station against intruders. McCoy surmises that the disease eventually wiped out the entire Kalandan species, and Spock suggests that the computer used images of Losira to do the job of defense. Kirk concludes that the landing party survived because the reproductions were so perfect that they experienced regret about killing. Production The original story outline was written by D.C. Fontana under the pseudonym Michael Richards. In this outline called "Survival", Losira is more brutal, encouraging the crew to turn on each other and fight. Reception In a 2010 review, Zack Handlen of The A.V. Club gave the episode a B. He found the stranding of the landing party a refreshing predicament for the series, and praised the depiction of both Spock's strengths and weaknesses as a commander, but questioned why the planet's defense system was so needlessly aggressive, and called the ending an unsatisfying info-dump. Releases This episode was released in Japan on December 21, 1993 as part of the complete season 3 LaserDisc set, Star Trek: Original Series log.3. A trailer for this and the other episodes was also included, and the episode had English and Japanese audio tracks. The cover script was スター・トレック TVサードシーズン This episode was included in TOS Season 3 remastered DVD box set, with the remastered version of this episode. References External links "That Which Survives" Review of the remastered version at TrekMovie.com Star Trek: The Original Series (season 3) episodes 1969 American television episodes Television episodes written by D. C. Fontana Television episodes directed by Herb Wallerstein Television episodes written by John Meredyth Lucas