(written from a Production point of view)
Sky 1 (formerly Sky One and Sky1) is a television broadcaster of Star Trek in the United Kingdom and Ireland. Sky obtained the first run rights for Star Trek: The Next Generation in 1992; prior to that the first run rights in Britain had been with the BBC, who had broadcast every episode from "Encounter at Farpoint" to "The Best of Both Worlds, Part II", excluding "The High Ground".
In addition to the first run rights for the rest of the series made to date, Sky 1 also acquired rerun rights to the episodes previously shown by the BBC and a TV movie version of "Unification I", which was shown on an exclusive "movie" channel rather than as part of the main run of the series.
The Next Generation was initially run on Sky 1 from "Encounter at Farpoint" being shown five nights a week at 5 pm, with "Family" shown the day after the Sky showing of "The Best of Both Worlds, Part II" and the series then running all the way up to "Timescape". After this, "Encounter at Farpoint" was shown and the whole series was run again. "Descent" was held over to act as the premiere to the seventh season, which was run on Sunday evenings at 7 pm once it had completed production and was available to be shown. This was also the time slot used for the first season of Star Trek: Deep Space Nine.
At first, the episodes of these later series were shown, as they were in the United States, with repeats between new episodes. However, Sky soon held back broadcasting new episodes and broadcast the entire series at once. After Deep Space Nine finished a season, Voyager would begin, and vice versa. Other shows that would fill the gaps included Stargate SG-1 and Andromeda.
Star Trek was moved to Sky Two for a short time, until that channel was taken off the air. Monday night at 8 pm was the traditional time for Star Trek. However, at the start of Enterprise Season 4, it was moved to Tuesdays. Star Trek's place was taken by The Simpsons. The final new episode of Star Trek was broadcast on 2nd August 2005. Episodes were also shown on the now defunct Sky One Mix channel.