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3183
Practical Joker, The
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On a routine mission surveying type-4 asteroids, the Enterprise is attacked by a trio of Romulan warships. The Romulans claim that the Federation ship has passed into their space. To avoid the...

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3614
Argelians
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Planet: Argelius II. Despite the hedonistic nature of the natives of Argelius II, their planet has long been known as a friendly shore-leave spot for Starfleet — even after the murderous...

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4187
Kzinti
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Also known as Kzin, the Kzinti are a race of sentient feline carnivores native to the planet Kzin. Kzinti are highly sexually dimorphic, at least in terms of intelligence; only the males are...

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Slaver Empire
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A galactic power that held sway over virtually all sentient life in the Milky Way Galaxy approximately one billion years ago, the Slaver Empire and its subject races were wiped out in a colossal...

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Slaver Weapon, The
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Aboard the Shuttlecraft Copernicus, Commander Spock and Lieutenants Sulu and Uhura are en route to Starbase 25, to which they are to deliver an exceedingly rare technological device: a stasis box...

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4523
Tribble
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Origin: unspecified. A small animal characteristically soft, furry, and pleasing to most humanoids (with the exception of Klingons). Tribbles give off a soft purring sound that is...

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Trials and Tribble-ations
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The Defiant is returning from Cardassian space with the Bajoran Orb of Time. A Klingon named Arne Darvin, surgically altered to look human, has come aboard as a passenger. He uses the Orb to send...

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4978
Mudd's Passion
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The Enterprise has come to the Arcadian star system to locate an "old friend," Harcourt "Harry" Fenton Mudd. Their mission is to corral Mudd for fraud, illegal drug manufacturing, and swindling....

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Rigelian Hypnoid
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A six-legged creature with purple fur, a long tail, and yellow eyes and claws. About the size of a medium-size dog, the Rigelian hypnoid can project simple illusions, and speak. In 2269 (stardate...

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Rock Creature
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A giant monster seemingly made of brown stone, the "rock creature" is encountered on an uncharted planet by Captain Kirk, Mr. Spock, Nurse Chapel, and conman Harcourt Fenton Mudd in 2269 (stardate...

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Ursinoid
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A race of bipedal creatures, ursinoids have brown skins, and resemble a cross between an ape, and a bear, with a dog-like snout. Both male and female ursinoids work as heavy metal miners on the...

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5143
Survivor, The
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While patrolling near the Romulan Neutral Zone, the Enterprise discovers a small, badly damaged ship and beams aboard its lone survivor, who appears to be Carter Winston, a wealthy space trader...

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Vendorians
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A race of sentient shape-shifters native to the planet Vendor. In their natural form, Vendorians look rather like floating orange lamps adorned with six trailing tentacles. Because of their...

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5267
Time Trap, The
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While exploring the Delta Triangle, a mysterious region of space where large numbers of starships have disappeared over the past couple of centuries, the Enterprise encounters a Klingon warship,...

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5275
Albatross
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As the Enterprise completes its mission to deliver medical supplies to Dramia, a surprising event occurs; the Dramians give Captain Kirk an arrest warrant for Dr. McCoy. According to them, 19...

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Dramians
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Native to the remote planets of Dramia and Dramia II , the Dramians are tall creatures who have a vaguely humanoid appearance, with yellowish skin, bulbous fish-like heads with large craniums, and...

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5329
Glommer
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A predator that feeds on tribbles, a glommer is larger than the average hand, and has a reddish four-legged body. Each leg has two joints, and the foot pads have four toes. The glommer also has...

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More Tribbles, More Troubles
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As it escorts two robot grain ships to Sherman's Planet, a world ravaged by crop failures and famine, the Enterprise breaks course to track a Klingon battle cruiser that is pursuing a one-man...

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5371
Cosmic Cloud
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A sentient, spaceborne entity that stretched across eight hundred thousand kilometers of space, with a width of about four hundred thousand kilometers. The creature's length measured roughly twice...

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One of Our Planets is Missing
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Starfleet Command dispatches the Enterprise to investigate the presence of an eight-hundred thousand kilometer-wide cosmic cloud, a bizarre mixture of matter and energy that has suddenly appeared...

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5373
Le-Matya
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This native animal to planet Vulcan is a large, mountain lion-like desert predator with a poisonous bite . It is capable of killing Vulcans and sehlats.

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Sehlat
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A large, bear-like animal native to Vulcan, sehlats typically possess six-inch fangs. Although sehlats can be ferocious in the wild, Vulcan families frequently domesticate them as pets. Spock had...

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Yesteryear
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Following a voyage back in time to observe the history of the Orion civilization, a team consisting of Kirk, Spock, and an historian named Erikson return to the year 2269 from the enigmatic time...

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5483
Lorelei Signal, The
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While on a mission to investigate a region of space in which starships have been disappearing at the rate of one every 27.346 years, the Enterprise is probed by a signal from the Taurean system...

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5499
Ambergris Element, The
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At the planet Argo, a team from the Enterprise takes an aquashuttle to the surface. The planet is almost completely covered in water due to earthquakes and other seismic phenomena, and the...

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Aquans
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The race of sentient humanoids living beneath the waters of the planet Argo are unknown to the Federation prior of 2269. When the crew of the U.S.S. Enterprise investigates the world, its officers...

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Sur-Snake
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A large scarlet colored sea beast on the planet Argo, the sur-snake has four long tentacles ending in flippers, a pair of yellow eyes, a dorsal fin, and fangs. When a Federation aquashuttle is...

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5501
Eye of the Beholder, The
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Orbiting the planet Lactra VII, the Enterprise is on a mission to investigate the fate of the S.S. Ariel and its six-member scientific crew, which have disappeared. A message from the ship's...

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Lactrans
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Giant creatures that resemble slugs, the orange Lactrans each have individual reddish markings on their backs and faces. They have two yellow eyes and a trunk which ends with three grasping...

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Maravel Dragons
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A flying, screeching creature indigenous to Maravel, and apparently resistant to phaser fire. When Captain Kirk and his landing party are on Lactra VII in 2269 (stardate: 5501.2), Kirk remarks...

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5521
Beyond the Farthest Star
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While the crew of the U.S.S. Enterprise is charting the space just beyond the edge of the galaxy, the starship becomes caught in the hypergravitational pull of the dead star known as Questar M-17....

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Edosian
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A tripodal, polytheistic race from the planet Edos. An Edosian has three legs, three arms, and three fingers on each hand and foot, with orange skin and a bony face. Lt. Arex is Edosian. Edosians...

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Magnetic Organism
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An intelligent, noncorporeal life form consisting of coherent magnetic fields, sometimes manifesting itself visually as a luminous green cloud. A malevolent magnetic organism inhabited the dead...

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5554
Infinite Vulcan, The
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Near the edge of the galaxy, on the recently discovered planet Phylos, Captain Kirk leads a landing party in the exploration of a technologically advanced city that has been overrun with plant...

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Phylosians
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Sentient plant people native to the planet Phylos, the Phylosians of the twenty-third century are heirs to a civilization that is long past its prime — a civilization they wish to see...

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Swooper
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A large, ferocious, birdlike flying creature that is actually a motile plant, like much of the life on its native planet Phylos. Swoopers typically measure more than five meters in length, and...

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5577
Gossamer Mice
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Test animals used in the medical laboratories of the U.S.S. Enterprise in 2269. Because these small, rodent-like extraterrestrial creatures are nearly transparent and are extremely sensitive to...

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Halo Fish
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Alien fish that bear a resemblance to terrestrial angelfish, except for the bright halo of multicolored light they emit. Because halo fish lose their colorful illumination in response to any...

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Terratin Incident, The
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A mysterious signal consisting of only one intelligible word — "terratin" — draws the Enterprise and her crew to the lone planet of the Cepheus system. While the Enterprise is orbiting...

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Terratins
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The descendants of the human settlers of the only planet orbiting the star Cepheus, the Terratins were shrunk to a few millimeters in height by the strange spiroid energy waves that suffuse the...

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5591
Once Upon a Planet
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The crew of the U.S.S. Enterprise is ready for some down time, and they head to the so-called "shore leave" amusement park planet in the Omicron Delta region. Dr. McCoy, along with Lieutenants...

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Pterodactyls
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Flying reptiles which existed from Earth's Triassic period to the end of the Cretaceous period, pterodactyls are properly called "pterosaurs." In 2269 (stardate 5143.3), when the starship...

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5683
Jihad, The
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The U.S.S. Enterprise has come to the Vedala asteroid on a unique mission, responding to a message from the Vedala that a threat to the universe is developing. Captain Kirk and Mr. Spock beam down...

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Skorr
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A race of avian creatures, the Skorr are a fierce and proud race who were once great warriors with advanced military technology and the ability to breed vast armies rapidly. According to Vulcan...

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Vedala
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According to Federation records, the Vedala are the oldest known spacefaring civilization. One representative of the Vedalan race is met in 2269 (stardate: 5683.1), by Captain Kirk and Mr. Spock....

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6063
Capellan Power-Cat
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The fierce Capellan power-cat hails from the planet Capella IV. Untamable, it will discharge 2,000 volts of electricity if even touched by another creature. Only a hypo with tranquilizer at its...

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How Sharper Than a Serpent's Tooth
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In late 2270, the Enterprise is following a propulsion trail, hoping to learn the origins of an alien space probe which scanned Earth and sent signals out into space, then self-destructed. They...

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6334
Pirates of Orion, The
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Her crew still recovering from a recent shipwide outbreak of choriocytosis, the Enterprise is en route to the dedication ceremonies for Deneb V's new Academy of Sciences. On the way, Commander...

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6770
Counter-Clock Incident, The
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The Enterprise is ferrying Commodore Robert April, the first commander of the U.S.S. Enterprise NCC-1701, and his wife, Dr. Sarah April (the ship's first chief medical officer), to the planetoid...

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7403
Bem
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The Enterprise is conducting planetary surveys with Commander Ari bn Bem, an observer from Pandro, a neutral world with which Starfleet and the Federation hope to establish diplomat relations;...

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Eggling
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Because Pandronians are hatched from eggs, Commander Ari bn Bem compared himself to an "eggling" — a newly hatched Pandronian youngster — to express how humbled he felt on stardate...

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Pandronians
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A light-green-skinned race of humanoid-appearing creatures native to the planet Pandro. Unlike virtually all other known humanoid species, however, Pandronians are actually "colony creatures"...

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44356
Breen
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Planet: name unspecified. A humanoid species from a cold planet who operate in a politically non-aligned manner and are reputed to be aggressive, with outposts in Sector 97. It is presumed that...

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45761
Kriosians
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Planet: Krios. The tall, slender humanoid members if this species share similarities in their skin pigments — a dark-spotted, skin pattern along the hairline and down the neck and spine...

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46379
Bajorans
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Planet: Bajor Humanoid race, distinguished outwardly only by extra wrinkles at the bridge of the nose, have wandered the galaxy and settled on various worlds ever since their homeland was...

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Cardassians
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Planet: Cardassia   Tall, long-necked, humanoid in appearance, marked by several bony protrusions and ridges: one from the shoulder to under the ears, whose bottom lobes in turn are more...

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Changeling
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Origin: Gamma Quadrant Little is known about this strange race. They call themselves Changelings, a name adopted from others' use. The Changelings are the highest order in a Gamma Quadrant...

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Emissary, Part I
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For six days during Stardate 43997, Captain Jean-Luc Picard of the Starship Enterprise was held captive by a sinister race called the Borg. The Borg altered the captain's appearance and mind and...

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Ferengi
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The homeworld of the Ferengi species is Ferenginar. The Ferengi have a culture which is based entirely upon commerce. They follow a code of conduct known as "The Ferengi Rules of Acquisition."...

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Frunalian
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Origin: the Alpha Quadrant. An alien species which took an early scientific interest in the discovery of the Bajoran wormhole near the Deep Space Nine space station. This species has also...

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Prophets
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Origin: Bajoran wormhole According to Bajoran religious doctrines, the prophets are the spiritual protectors and guides to the Bajoran peoples. Throughout Bajoran history, several unusual...

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Symbionts, Trill
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Only 300 symbionts are available for hosting each year on average. If a host is weak, the personality of the symbiont will overwhelm it. Unless its current Joined Host objects, a prospective Host...

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Trunkhead Aliens
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Planet: unspecified. Commonly seen in Federation faciliities such as DS9. A dull brown-skinned race with pointed upswept ears and a long, trunk-like, fleshy protrusion from the back of the skull...

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Wormhole Aliens
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Origin: The Bajoran wormhole. Non-corporeal, non-linear telepathic race who built the wormhole adjoining Bajor some 10,000 years ago and worshiped by the natives there as "The Prophets" because of...

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46392
Emissary, Part II
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On a distant outpost at the edge of the final frontier, an untested crew embarks on an unprecedented journey. For six days during Stardate 43997, Captain Jean-Luc Picard of the Starship...

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46401
Joranian ostrich
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Planet: name unspecified. An alien ornithic species with an extremely fearful disposition. Fear has developed notable evolutionary flaws in the species; if frightened, the Joranian ostrich is...

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Past Prologue
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Dr. Bashir is excited to meet Garak, the last Cardassian aboard Deep Space Nine and a rumored spy. He rushes to tell the rest of the crew, but they are busy rescuing a Bajoran, Tahna Los, whose...

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46410
Move Along Home
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Commander Sisko, in dress uniform, prepares to receive the first formal alien delegation from the Gamma Quadrant — a group from a newly discovered species known as the Wadi. Sisko, Kira,...

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Wadi
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Origin: Gamma Quadrant Space-faring and game-loving humanoid race (pronounced "WAH-dee") from an unspecified planet whose people are the first formally known to be contacted from the Alpha-Beta...

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46421
Garanian Bolites
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Extremely small creatures which act as irritants when they come into contact with humanoid skin, as two unsuspecting Bajorans learned due to a trick played on them by Jake and Nog in 2369.

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Man Alone, A
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The adjustment period aboard Deep Space Nine continues as transplants from across the galaxy attempt to come to terms with their new life and each other. O'Brien's wife Keiko misses the U.S.S...

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46423
Babel
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Frustrated by the mechanical problems on the space station, O'Brien attempts to fix the food replicators. Little does he know, an alien device has found a way into the station circuitry. For some...

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46495
Captive Pursuit
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While listening to a complaint about Quark's lascivious behavior from a Dabo girl, Sisko is alerted that an alien vessel is coming through the wormhole. The vessel contains a reptilian being named...

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Hunters
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Origin: unknown planet in the Gamma Quadrant. A humanoid race who live to pursue the Tosk in an endless life-and-death hunt, never contacted again after a single incident on DS9 in 2369 soon after...

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Tosk
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Origin: Gamma Quadrant A reptilian race, bred by unspecified eugenicists to enjoy being hunted and provide as exciting and interesting a chase as possible. They live only to outwit their Hunters...

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Vulcans
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Planet: Vulcan A humanoid race, with copper-based blood, slightly green-tinted complexion and notably pointed ears, they are responsible in a large part for the founding of the Federation. Over...

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46531
Q-Less
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Returning from a mission to the Gamma Quadrant on the other side of the wormhole, Lieutenant Dax and an ensign are trapped in their Runabout. While O'Brien works to free them, Dr. Bashir sees...

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Verathans
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Origin: the Gamma Quadrant. A humanoid race (pronounced "vuh-RATH-uns") whose civilization reached its height 30,000 years ago, spanning over two dozen systems interconnected with a highly...

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46578
Yridians
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Planet: name unspecified. This wrinkly-skinned alien species famed as information merchants was known to the Vulcans before humans, at least in the altered but impermanent future during Archer's...

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46594
Kobliad
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Origin: unspecified planet near the Bajoran system. Dying humanoid space-faring culture near the Bajoran system (pronounced "KOH-blee-add") who use Federation-supplied deuridium to stabilize their...

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Passenger
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Traveling in a runabout, Kira and Bashir pick up a distress signal from a disabled Kobliad ship. They beam over to discover an injured Kobliad woman named Ty Kajada, a security officer. Her...

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46649
Dolbargi
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A culture capable of a self-induced death-simulation technique that is teachable to and usable by others, including Hupyrians and Ferengi — as servant Maihar'du taught Grand Nagus Zek.

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Hupyrians
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Planet: name unspecified. A tall, facially-wrinkled, white-skinned, mute, humanoid species, many members of whom can be found working for important Ferengi officials because the Hupyrians have a...

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Tarahongians
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Planet: name unspecified. A people (pronounced "tair-uh-HONG-ee-uns") who are naturally gullible — at least according to Quark, who shrugs off Grand Nagus Zek's praise at selling their...

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The Nagus
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It's business as usual for Quark at his bar, until he is approached by a Ferengi named Krax, who presents his father, Grand Nagus Zek, the elderly, shrewd, revered leader of the Ferengi business...

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46715
Altorans
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Origin: unknown. Rumored to be traders with the Miradorn species.

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Miradorn
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Planet: name unspecified. A race (pronounced "MEER-a-dorn") in which all are twins who make up a single self as two halves of one being — a "quarrelsome people," according to Quark. Natives...

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Rakhari
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Planet: Rakhar, Gamma Quadrant. Humanoid race distinguished by heavy ridges down the nose and full heads of bushy hair. Aware and unafraid of space-farers, they cared little about outside contact...

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Vanoben
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Planet: name unspecified. The otherwise nondescript home (pronounced "van-NOBB-un") of a transport ship raided only two light years from Deep Space Nine, when an artifact similar to one being...

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Vortex
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While haggling with a pair of twinned Miradorns over a valuable goblet for which he had agreed to provide a buyer — until learning that the artifact in question may have been acquired...

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46729
Dal'Rok
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Planet: Bajor. A unique creature made of energy that is fabricated for five days of every year by the Bajoran Sirah to place two opposing villages against a mythical creature and thereby continue...

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Storyteller, The
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Sisko and Kira play host on the space station to the leaders of two rival Bajoran factions — the Paqu and the Navot. Sisko has stepped in to mediate their land dispute in an effort to avert...

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46753
Battle Lines
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Kai Opaka, Bajor's spiritual leader, pays a surprise visit to the station — her first journey away from her home planet. Sisko, Kira, and Bashir escort her on a tour of the station, and...

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Ennis/ Nol-Ennis
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Origin: Gamma Quadrant. Two humanoid factions of the same species who fought for so long they were banished to a prison moon to continue their fighting, able to finally die only if they escape the...

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46844
Carnivorous Rastipod
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Origin: Bajor. An animal reputed for a distinct lack of grace — apparently, a beast with two left legs.

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Progress
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With the Federation's help, the Bajoran government is about to perform a massive energy transfer by tapping the molten core of its fifth moon, Jeraddo. In preparation, Kira and Dax make an orbital...

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46853
Beneriam Hawk
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Planet: name unspecified. A predatory ornithoid life-form to whom Chief of Security Odo was compared on stardate 46853.2.

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Gunji jackdaw
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Origin: Alpha Quadrant. A species resembling an ostrich, spotted on Deep Space Nine's Promenade on stardate 46853.

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If Wishes Were Horses
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While Sisko, Kira, and Dax investigate readings of unusually high thoron emissions coming from the plasma field in their area of space, O'Brien reads his daughter Molly a bedtime story about...

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46910
Argosian
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Planet: Argosia. An alien species, one member of whom once threw a drink in Commander Sisko's face and nearly caused a brawl to break out.

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