The Enterprise D entering orbit around Nervala IV

Nervala IV is an inhospitable planet whose atmosphere is wrapped in a highly unstable distortion field, allowing transport only once every eight years. The planet's surface is as lethal as the atmosphere is unstable, the research facility needed a shield to protect the facility's inhabitants from the lethal radiation outside.


During an attempt to evacuate a Starfleet research team during 2361, Lieutenant William T. Riker, who was on temporary assignment aboard the USS Potemkin, was nearly trapped on the planet as the transport window began closing in on him. In order to get him out safely, a second confinement beam was used to strengthen his signal. When the transporter chief aboard the Potemkin got Riker to safety, the second beam was cut off, but rather than breaking down to nothing, the second beam, which apparently bounced off of the atmosphere's distortion field, was sent back to the surface, where an exact duplicate of Riker materialized back inside the facility where he lived for eight years until he was rescued in 2369. In that year, Commander Riker, then serving as first officer under Captain Jean-Luc Picard on board the USS Enterprise-D, returned to the planet with an away team to collect the research that was left behind eight years ago. The double decided to go by the name Thomas Riker, making use of his middle name. (TNG episode: "Second Chances", DS9 episode: "Defiant")

In 2371, Odo mentioned Nervala IV when informing Gul Skrain Dukat on the events leading up to the transporter accident. (DS9 episode: "Defiant")

Planets visited by the USS Enterprise-D
2364 EarthDeneb IVArcharia IIILigon IIStyris IVOmicron ThetaGamma Tauri IVDelphi Ardu IVPeacekeepers' WorldParliamentRubicun IIIQuadra Sigma IIIHavenTorona IVAngel IStarbase 74 planetBynausTigan VIISyntagus TheluvTarod IXFaltosPersephone VMordan IVAldeaVelara IIIRelva VIIMinosBrentis VITrevaVagra IIOrnaraBrekkaVandor IVSarona VIIIDytallix B
2365 'aucdet IXTenaraEpsilon Miranda VDQN 1196RaimonFeeniks-Denn IVHimalias VThiopaGravesworldRamatis IIISolais VGagarin IVElysiaIconiaTheta 116 VIIIPacificaBringloid VMariposaDrema IVBraslota IISurata IV
2366 Kavis Alpha IVTau Cygna VGalorndon CoreAcamar IIIOrelious IXBre'el IVCassiopeia Delta VIIArcher IVBetazedVulcanRutia IVGrindelwaldJouret IV
2367 SaturnEarthTurkana IVCamus IITagus IIIMalcor IIIAdelphous IVEvadne IVQo'noS
2368 Qo'noSEl-Adrel IVValo IValo IIQualor IIVulcanGalorndon CoreHermeticus IIVotar VIISindarJ'naiiNaia VIIDelta IVCogen VTau LeeTessen IIIRajatha PrimeEarth
2369 FrigisHobson Delta IIBajorElohRiatAtrea IVNervala IVEnoch VIIEarth
2370 Terrellian crashsite worldMarijne VIIN'trahnDessica IIBarradas IIICalder IIVulcanKesprytt IIIEnoch VIIDyson SphereHeraAtrea IVVacca VIDorvan VHeraKrantinSyng IIEarth
2371 SindikashThanetNtignanoDamianoVeridian III

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