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1312
Aldebaran
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A Type K5 star only 68 light-years from Sol, named and sighted as one of the brightest in the night sky by Earth's ancients. Aldebaran is known by its old Earth Bayer classification: Alpha Tauri....

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Starfleet Academy
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The Federation's primary academic and leadership center of higher education for its Starfleet officer corps is based at San Francisco, Earth, adjoining Starfleet Headquarters in a complex near the...

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Where No Man Has Gone Before
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Some years before this second pilot, the S.S. Valiant had encountered a unknown energy barrier at the rim of the galaxy. Something had then made its captain destroy his ship. The U.S.S....

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1329
Mudd's Women
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The U.S.S. Enterprise pursues an unknown ship into an asteroid belt to save its crew before it's destroyed. The four people aboard are beamed on to the U.S.S. Enterprise; former nemesis Harry Mudd...

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Ophiucus System
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Location of a U.S.S. Discovery skirmish with the Klingons in the mid-23rd century. The system contains a Class-M planet, Ophiucus III which was the attempted destination of Harcourt Fenton...

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1512
Corbomite Maneuver, The
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While exploring an uncharted region of space, the U.S.S. Enterprise comes upon an alien space buoy which is cube-shaped and spins, warning ships away and blocking the starship's path. Kirk's...

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1513
M-113
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Class M planet whose dominant humanoid species became extinct in 2266, last seen by a Federation archeology team of Robert and Nancy Crater. The natives, who fed maily n salt, had the power of...

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Man Trap, The
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The U.S.S. Enterprise arrives at planet M-113 to deliver supplies to Dr. Robert Crater and his wife, Nancy, whom Doctor Leonard McCoy was once romantically involved with. M-113 is home to the...

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1533
Alpha V
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An Earth colony that was home to some of Charles Evans' relatives in 2266.

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Charlie X
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Charles Evans, the lone survivor of a crashed colonizing expedition to the planet Thasus, comes aboard the U.S.S. Enterprise from the S.S. Antares. But when the Antares' Captain Ramart contacts...

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1672
Alfa 177
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Class-M planet geo-surveyed by the U.S.S. Enterprise on stardate 1672.1, when a transporter malfunction trapped Lt. Sulu's landing party on the surface overnight during freezing cold that left...

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Enemy Within, The
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While orbiting the planet Alfa 177, the U.S.S. Enterprise experiences a transporter malfunction when Technician Fisher is beamed up from the planet with some magnetic ore on his clothing. Scotty...

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1704
Naked Time, The
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Spock and Joe Tormolen beam down to planet Psi 2000 to pick up a research party before the planet disintegrates. They find everyone has died, frozen when life support was turned off. Even...

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1709
Balance of Terror
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The marriage of Angela Martine and Robert Tomlinson is interrupted when a Romulan bird-of-prey attacks and destroys Outpost 4, which guards the Neutral Zone between Federation and Romulan space....

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Neutral Zone, Romulan
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An area of space between the United Federation of Planets and the Romulan Star Empire that measures approximately one light year and serves as a "buffer" zone.  Any incursion into the...

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Remus
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Sister planet of Romulus and one of the two planets gripped by a bird's talons in the Romulan Empire insignia. Although a neighbor to Romulus, Remans bear little physical resemblence to the more...

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2124
Squire of Gothos, The
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The U.S.S. Enterprise must cross an empty sector of space on their way to deliver supplies to colony Beta VI. In this space, they find an uncharted planet whose presence can't be explained. After...

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2254
Cage, The
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Thirteen years before James T. Kirk takes command of the U.S.S. Enterprise, Captain Christopher Pike and his starship crew receive a distress signal from the planet Talos IV and beam down to...

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Class-M planets, various
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Planets that are highly supportive of organic life. Both Earth and Vulcan are Class-M planets.   In the Alpha/Beta Quadrants, one otherwise unnamed world among several Class-M planets...

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Talos IV
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Class-M planet, home of the Talosians. Thousands of centuries ago, a nuclear war nearly wiped out the entire civilization; the survivors lived underground where they became dependent on...

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2534
Ekos
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Orbiting the star M34 Alpha, Ekos is the home of a humanoid native race which was corrupted by unauthorized Federation hstorian John Gill into adopting the Nazi credo and attacking neighbor world...

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Patterns of Force
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The U.S.S. Enterprise is sent to planet Ekos to investigate the disappearance of an old Academy professor of Kirk's — historian John Gill. The Enterprise is attacked by an armed probe with a...

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Zeon
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The outer of two planets of M34 Alpha and home to a humanoid native race preyed upon by sister planet Ekos in rthe mid-2200s. The culture has rudimentary interplanetary travel.

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2712
What Are Little Girls Made Of?
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The U.S.S. Enterprise arrives in orbit around Exo III, to search for exobiologist Dr. Roger Korby. When Kirk asks Spock if Korby could possibly still be alive, Spock glances at Christine, then...

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2713
Miri
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The U.S.S. Enterprise answers an old distress signal to find an unnamed planet that is almost an exact duplicate of Earth in the 1960s. A landing party beams down and discovers that 300 years...

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2715
Dagger of the Mind
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When Dr. Simon van Gelder of the psychiatric staff at the Tantalus Penal Colony escapes to the U.S.S. Enterprise exhibiting signs of manic insanity, an enraged McCoy insists that Kirk investigate...

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2817
Conscience of the King, The
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Twenty-two years before stardate 2817.6, the governor of Tarsus IV, Kodos, evoked emergency martial law and ordered half of the planet's population executed. His intent was to address a severe...

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2821
Galileo Seven, The
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On its way to deliver medical supplies to plague-ridden Makus III, the U.S.S. Enterprise passes Murasaki 312. Since they are under Starfleet orders to inspect galactic phenomena such as this...

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2947
Alpha III
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Origin of the civil liberties document cited by Samuel T. Cogley during Captain Kirk's court-martial on stardate 2947.3.

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Court Martial
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When the U.S.S. Enterprise puts in at Starbase 11 for repairs caused in an ion storm, Kirk gives his report of the circumstances of Lieutenant Commander Ben Finney's death to Commodore Stone. All...

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3012
Menagerie, Part I, The
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The U.S.S. Enterprise and her crew are diverted by a signal from the former captain of the U.S.S. Enterprise on Starbase 11, and proceed to the call. When they arrive they find Captain Christopher...

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3013
Menagerie, Part II, The
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The U.S.S. Enterprise and her crew are diverted by a signal from the former captain of the U.S.S. Enterprise on Starbase 11, and proceed to the call. When they arrive they find Captain Christopher...

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3018
Catspaw
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On the planet Pyris VII, two beings known as Korob and Sylvia have been sent on a mission of conquest by their home world. Using a matter transmuter, they assume human form to welcome the U.S.S....

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3025
Shore Leave
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A U.S.S. Enterprise landing party beams down to an uncharted planet. The planet seems like a perfect candidate for shore leave with its "Earth-type" characteristics. Kirk sends McCoy down with the...

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3045
Archanis
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Star with at least four planets and the namesake of its sector, adjoining the Bajor sector, three days journey from DS9 and visible from the Cestus region. Relinquished by the Klingons along...

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Arena
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The U.S.S. Enterprise is in pursuit of an unknown alien ship which has destroyed a Starfleet base on Cestus III. In an uncharted area of space, both the alien ship and the Enterprise are caught by...

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Cestus
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Star. Its system of at least three planets is eight weeks from DS9 at maximum warp.

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3087
Alternative Factor, The
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While orbiting what should be a dead planet, the U.S.S. Enterprise experiences a moment of "nonexistence." Starfleet Command fears an enemy invasion and orders Kirk to find out what caused the...

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3113
Tomorrow Is Yesterday
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When the U.S.S. Enterprise is thrown into a time warp by a black star, it ends up orbiting Earth in the 20th century. Omaha Air Base detects a peculiar UFO and sends a fighter plane, manned by...

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3134
City on the Edge of Forever, The
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McCoy accidentally injects himself with an overdose of cordrazine, a drug which makes him exhibit signs of paranoia and madness, while treating an ailing Sulu on the Bridge. Delirious, he beams...

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3141
Ceti Alpha V
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The rugged Class-M world is where Captain Kirk leaves Khan Noonien Singh, former Lieutenant Marla McGivers and Khan's band of Eugenics War-era "supermen" survivors from the Botany Bay to fend for...

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Space Seed
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A piece of one of history's great puzzles falls into place when Kirk's crew comes across the S.S. Botany Bay, an old-style, pre-warp sleeper ship from Earth that contains several bodies in stasis....

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3156
Return of the Archons, The
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The U.S.S. Enterprise is investigating Beta III, where the U.S.S. Archon disappeared over 100 years before. When the landing party exhibits strange behavior, Kirk sends another party down to...

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3192
Eminiar VII
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M-class planet with an advanced civilization that has been at war with its neighboring planet, Vendikar, for over 500 years. While on a diplomatic mission, the crew of the U.S.S Enterprise...

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Taste of Armageddon, A
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The U.S.S. Enterprise is ordered to pick up Ambassador Robert Fox, who is headed to planet Eminiar VII on a diplomatic mission. Upon arriving at the planet, the ship is warned away. Beaming to...

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3196
Devil in the Dark, The
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The U.S.S. Enterprise arrives to investigate reports of an unknown monster deep in the mining tunnels of Janus VI. The being is apparently destroying machinery and killing the miners, and has the...

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3198
Errand of Mercy
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Kirk and Spock beam down to the surface of planet Organia to negotiate for the erection of a Federation base on that planet. Hostilities between the nearby Klingon Empire and Federation have...

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Organia
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A planet of non-corporeal beings who stopped a war between the UFP and Klingon Empire in 2365 and enforced the first detente between them for years afterward. Kor led the Klingons' would-be...

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3211
Gamesters of Triskelion, The
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During a routine transport to a planet, Captain Kirk, Lieutenant Uhura and Ensign Chekov are intercepted and abducted by a powerful and distant transporter beam. Arriving, literally, flat on their...

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3219
Metamorphosis
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Assistant Federation Commissioner Nancy Hedford has become ill while trying to stop a war on Epsilon Canaris III. The shuttlecraft Galileo is assigned to take her to the U.S.S. Enterprise, where...

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3287
Deneva
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M-class planet considered by many to be one of the most beautiful in the galaxy, colonized by humans in the 22nd century, later becoming a Federation world, and used as a freighting line base in...

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Operation: Annihilate!
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Arriving at the planet Deneva, home of Kirk's only brother Sam and his family, the U.S.S. Enterprise picks up a transmission from a Denevan pilot who has steered his craft into the sun to destroy...

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3372
Altair VI
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Center of the Altair system, the planet was recovering from a longtime intersystem war when the U.S.S. Enterprise was ordered to attend its new president's inauguration ceremony in 2267. The visit...

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Amok Time
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When Spock begins to exhibit strange, erratic behavior, Kirk asks McCoy to conduct a medical examination. McCoy concludes that Spock is experiencing a potentially lethal internal distress. Spock...

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3417
Berengaria VII
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A planet known for its dragon-like lifeforms.

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This Side of Paradise
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Expecting the colonists of Omicron Ceti III to be dead after three years of exposure to deadly Berthold rays, Kirk and Spock are surprised to find the colony alive and flourishing. Spock beams to...

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3451
Changeling, The
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The U.S.S. Enterprise is sent to investigate the destruction of the Malurian system and its four billion inhabitants. When it arrives at the coordinates, the starship itself is threatened by a...

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3468
Antos IV
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Home to both a species of giant energy-generating worms and an intelligent species using the art of cellular metamorphosis. Captain Garth learned the ability while convalescing on this planet.

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Who Mourns for Adonais?
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As the U.S.S. Enterprise nears the planet Pollux IV, a huge, green hand made of energy materializes in space, catching the U.S.S. Enterprise and holding it captive. Kirk and a landing party are...

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3478
Aldebaran III
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Longtime Federation member planet on which Janet and Theodore Wallace performed experiments using carbohydrate compounds to slow the aging of plants. Grand Nagus Zek's nephew Belongo was...

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Deadly Years, The
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On the way to Starbase 10, the U.S.S. Enterprise stops to deliver supplies to the colonists of Gamma Hydra IV. A landing party consisting of Kirk, Spock, McCoy, Scott, Lieutenant Galway and Chekov...

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3497
Capella IV
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Class-M planet with relatively primitive tribal inhabitants. The planet is a rich source of topaline, a rare mineral vital to the life-support systems of many Federation colonies. The U.S.S....

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Friday's Child
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Sent to the planet Capella IV to negotiate a mining treaty, Kirk and a party beam to the surface. They find the Capellans to be warlike and tradition-bound people. Kirk also finds that a Klingon...

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3614
Alpha Carinae V
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The home planet of the Drella, an entity that absorbs energy from the feelings of love it senses around it.

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Alpha Majoris I
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Homeworld of a lifeform known as the Mellitus, which is gaseous in transit but becomes solid when still.

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Alpha Proxima II
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One of several planets where female residents were brutally stabbed to death in the style of Jack the Ripper. A lifeform that fed off terror and fear was responsible.

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Argelius II
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Class-M planet strategically important for its port for space-faring races, especially thanks to its hedonistic and hospitable humanoid natives. It was beset by the murdering Redjac entity in 2267.

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Wolf in the Fold
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Kirk and McCoy decide to take Scotty, who is recovering from a head wound accidentally caused by a female crew member, to a nightclub on the planet Argelius II. Scotty becomes infatuated with a...

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3619
Obsession
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Eleven years ago, the U.S.S. Farragut encountered a deadly cloud creature with vampire-like tendencies. James T. Kirk was on board the Farragut at that time as they entered the region of Tycho IV....

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Tycho IV
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World where a dikironium cloud creature was chased and desroyed in 2268 by the U.S.S. Enterprise. The Class M but unpopulated world suffered cataclysmic atmospheric damage in the antimatter...

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3689
Mirror, Mirror
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Caught in the beginnings of an ion storm, Kirk, McCoy and Uhura interrupt their negotiations with the Halkans for dilithium crystals, to return to the U.S.S. Enterprise. Scotty beams the landing...

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3715
Apple, The
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When a landing party beams down to the planet Gamma Trianguli VI, they find what appears to be an idyllic paradise. They quickly discover, however, that the planet is deadly, sporting plants that...

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3842
Babel
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Neutral rogue planet where the Federation Council met in 2267 to determine the admission of the Coridian planets to the Federation.

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Coridan
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Coridan is the collective name of a group of inhabited worlds in the Coridan system, whose admission to the United Federation of Planets was debated and ultimately approved during the Babel...

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Journey to Babel
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The U.S.S. Enterprise is appointed to transport ambassadors from many worlds to the Babel Conferences. Among those aboard are Ambassador Sarek of Vulcan and his human wife, Amanda — Spock's...

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Orion
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Also known as the Orion Syndicate, the name "Orion" refers to a loose nation or empire run and administered by green-skinned humanoids. The most notable of these are the so-called "green animal...

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4040
Bread and Circuses
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The U.S.S. Enterprise finds the wreckage of the S.S. Beagle, with no survivors, orbiting near the Planet 892-IV. When Kirk, Spock, and McCoy beam to the planet's surface, they find a disheveled...

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4202
Doomsday Machine, The
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Sent to investigate the destruction of several planetary systems, the U.S.S. Enterprise discovers a crippled starship, the U.S.S. Constellation, floating in space. Commodore Matthew Decker is the...

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4211
Private Little War, A
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Captain Kirk leads a survey mission to a peaceful, primitive planet which he visited 13 years before as a lieutenant. He is dismayed to see a group of villagers armed with flintlocks, weapons they...

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4307
Immunity Syndrome
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The U.S.S. Enterprise is en route to Starbase 6 for shore leave when Uhura receives a jumbled message from which all she can make out is a sector coordinate and the name U.S.S. Intrepid, a...

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4372
Elaan of Troyius
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Two United Federation of Planets members, Elas and Troyius, suffered war for centuries. With Klingon Empire expansion approaching the planets' system, Tellun, the Federation sends the U.S.S....

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Tellun
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A binary system with a G-class star and an A-class star near the Klingon-Federation border. During the mid-23rd century, the system was under Federation control including two planets in the...

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4385
Spectre of the Gun
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Kirk ignores an alien buoy that warns the U.S.S. Enterprise that it is trespassing into Melkotian space and continues forward when the Melkots transport Kirk, Spock, McCoy, Scotty, and Chekov to a...

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4513
I, Mudd
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Norman, an android pretending to be a member of the U.S.S. Enterprise crew, takes control of the starship and her crew, taking them to an unnamed planet where Kirk discovers an old nemesis ......

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4523
Trouble With Tribbles, The
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When the U.S.S. Enterprise receives a top-priority order to protect a shipment of quadrotriticale grain on Deep Space Station K-7, Kirk is irritated to be guarding a shipment of "wheat." But the...

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4598
Beta Antares IV
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Whether populated or not, this world was mentioned as the home of a confusing card game named fizzbin in a ruse by James Kirk to escape captors on Sigma Iota II in 2268.

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Piece of the Action, A
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The planet Sigma Iotia II's last visit by the Federation was by the U.S.S. Horizon ... a hundred years before. Realizing the lapse in monitoring the planet, the Federation sends the U.S.S....

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4657
Andromeda Galaxy
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Nearest neighboring galaxy to the Milky Way. Origin of the intelligent, noncorporeal spacefaring species known as the Kelvans.

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By Any Other Name
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When the U.S.S. Enterprise answers a distress call from a small planet, the landing party is captured by a group of agents from the Kelvan empire, located in the distant Andromeda galaxy. The...

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4729
Alpha Carinae II
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Class-M planet on which Dr. Daystrom's M-5 computer was tested in 2268.

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Ultimate Computer, The
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The U.S.S. Enterprise is chosen to be the test ship for the new M-5 multitronic computer system, a computer meant to be able to run a starship without human intervention. Also aboard for the test...

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4739
Assignment: Earth
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Sent back in time to find out how Earth managed to survive without destroying itself, the U.S.S. Enterprise inadvertently beams aboard a space traveler, Gary Seven, along with his black cat, Isis....

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4768
Return to Tomorrow
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The U.S.S. Enterprise tracks a mysterious SOS to an ancient planet presumed long dead. The crew hears a voice from a telepathic being named Sargon, who asks Kirk to beam down to the surface. When...

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4842
Amerind planet
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A Class-M planet, otherwise unnamed, located in a dense asteroid belt and home to a colony of Native Americans that were transported there from Earth by an ancient race known as the Preservers...

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Miramanee's Planet
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Class-M planet where an ancient civilization known as the Preservers transplanted several tribes of Native Americans centuries ago. The planet was in the midst of a dangerous asteroid belt, so...

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Paradise Syndrome, The
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Investigating a planet in danger of collision with an asteroid, Captain Kirk, Mr. Spock, and Dr. McCoy discover both Native American inhabitants and a strange alien obelisk. While examining the...

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4985
Omega Glory, The
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The U.S.S. Enterprise finds a crewless starship, the U.S.S. Exeter, in orbit around the planet Omega IV. The boarding party from the U.S.S. Enterprise contracts a virus that may have killed the...

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5027
Enterprise Incident, The
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Seeming tense and erratic, Captain Kirk takes the U.S.S. Enterprise into Romulan space and the ship is immediately surrounded by Romulan warships. Kirk and Spock beam aboard the Romulan flag-ship...

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5029
And the Children Shall Lead
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When the U.S.S. Enterprise finds that all the adults in the Starnes Expedition to Triacus have killed themselves, they beam to the planet's surface to investigate. The children, however, are alive...

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5121
Empath, The
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The U.S.S. Enterprise goes to pick up research personnel on the second planet of the star Minara. While Kirk, Spock and McCoy are on the surface, a radiation storm endangers the starship and...

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