EntityQ3487499· pop 10· linked from 147 articlesAssignment: EarthSign in to save26th episode of the second season of Star Trek: The Original SeriesConnectionsdanceEntityactorEntityNASAConceptInternational Standard Book NumberEntitynuclear weaponEntitylight-yearEntityCentral Intelligence AgencyEntityIMDbEntityWayback MachineEntityStar TrekEntityWorld War IIIConcepttime travelEntityOCLC, Inc.EntitySaturn VEntityStar TrekEntityGene RoddenberryEntityStar Trek: The Original SeriesEntityStar Trek: The Next GenerationEntityStar Trek: First ContactEntityStar Trek: VoyagerEntityCategories1968 American television episodesAccuracy disputes from March 2022Star Trek: The Original Series season 2 episodesStar Trek time travel episodesTelevision episode articles with short description for single episodesTelevision episodes directed by Marc DanielsTelevision episodes set in 1968Television episodes written by Gene RoddenberryTelevision pilots not picked up as a seriesTelevision pilots within series