Deep Space Station K-7

Deep Space K-7, later renamed Deep Space 7, was a Federation deep space station that was in service in the mid-23rd century. This station was constructed by Starfleet and was administered by a civilian staff. Located within Federation space, K-7 was situated near the border of the Klingon Empire, was approximately 3.26 light years from the nearest Klingon outpost, and was at least two hundred light years from the Cardassian Union. In 2268, the station's manager was Mr. Lurry.

History
In the year 2268 Cyrano Jones, an interstellar trader, introduced a litter of tribbles to K-7, which quickly grew into an infestation. (DS9: "Trials and Tribble-ations") IKS Gr'oth and USS Enterprise orbiting the station The infestation coincided with the arrival of Federation undersecretary Nilz Baris, who transported several tons of the grain quadrotriticale to K-7, intended for cultivation on Sherman's Planet. Unbeknownst to Federation officials, the grain had been poisoned by Klingon spy Arne Darvin, in collusion with the visiting crew of the IKS Gr'oth. It was not until hundreds of tribbles were found dead, gorged on the poisoned grain, that the contamination was revealed. (TOS: "The Trouble with Tribbles"; TAS: "More Tribbles, More Troubles") In the year 2373, an elderly Arne Darvin, traveled back to K-7 of the past, where he planted a tricobalt bomb, intended to kill Starfleet Captain James T. Kirk and prevent his own "dishonor". Darvin was ultimately caught by Captain Benjamin Sisko and the crew of the USS Defiant and returned to the 24th century. This incident caused some minor changes in the timeline to take place. In one instance, Miles O'Brien and Julian Bashir, disguised as members of Kirk's crew, became involved in a bar brawl between Klingons and Enterprise crewmembers. After the fight, Kirk lined up his officers for questioning. Prior to the temporal change, Freeman was questioned by Kirk, but the temporal incursion caused O'Brien to take his place.

In 2375, Commander Chakotay pretended to have caught a transport vessel, after serving three years aboard the USS Intrepid while it patrolled the Neutral Zone, at Deep Space 7 for a return trip to Earth in the Species 8472 recreation of Starfleet Academy.