ancient Greece, respectively). Two episodes depicting time travel ("Tomorrow Is Yesterday" and "Assignment: Earth") conveniently place Enterprise in orbit above 1960s Earth; a third ("The City on the Edge of Forever") places members of the crew on 1930s Earth. Top ranked episodes Several publications have ranked the ten best episodes of Star Trek: Of the twenty-one different episodes listed above, thirteen – "Where No Man Has Gone Before", "The Enemy Within", "The Naked Time", "Balance of Terror", "The Galileo Seven", "Arena", "Space Seed", "This Side of Paradise", "The Devil in the Dark", "A Taste of Armageddon", "The Corbomite Maneuver", "The Man Trap", and "The City on the Edge of Forever" – are from the first season and six – "Amok Time", "The Doomsday Machine", "Mirror, Mirror", "The Trouble with Tribbles", "A Piece of the Action", and "Journey to Babel" – are from the second season. Only two – "The Enterprise Incident" and "Let That Be Your Last Battlefield" – derive from the third season. Only two episodes, "The City on the Edge of Forever" and "Space Seed", appear on all five lists. Leonard Nimoy: Star Trek Memories In 1983, Leonard Nimoy hosted a one-hour special as a promotional tie-in with the film Star Trek III: The Search for Spock, in which he recounted his memories of working on the original series and explained the origins of things such as the Vulcan nerve pinch and the Vulcan salute, as well as a re-airing of the TOS episode "Space Seed". Music Theme tune The show's theme tune was written by Alexander Courage and has been featured in several Star Trek spin-off episodes and motion pictures. Gene Roddenberry subsequently wrote a set of accompanying lyrics, even though the lyrics were never used in the series, nor did Roddenberry ever intend them to be; this allowed him to claim co-composer credit and hence 50% of the theme's performance royalties. Courage considered Roddenberry's actions, while entirely legal, to be unethical. Series producer Robert Justman noted in the book Inside Star Trek: The Real Story, that work on the film Doctor Dolittle kept Courage from working on more than two episodes of the first season. However, Justman also believed that Courage lost enthusiasm for the series because of the "royalty" issue. Courage did not score any episodes of the second season; however, he did conduct a recording session for about 30 minutes of "library cues" for