The success of The X-Files on Fox resulted in NBC commissioning this proposed competitor following a pitch from producers Bryce Zabel and Brent Friedman.

As the series progresses, viewers follow John Loengard and Kim Sayers through the 1960s as they attempt to foil the plots of the alien "Hive".

The Hive is an alien race that planned to invade Earth through a manipulation of historical events and famous figures, including most notably the assassination of President John F. Kennedy.

The show depicted a number of real-life 1960s personalities in the plot, such as The Beatles, Robert F. Kennedy, Jim Morrison, and J. Edgar Hoover.

[2] Initial symptoms of take-over include drastic mood swings, behavioral abnormalities, and nervous breakdowns, as the parasite adjusts to taking control of the person's mind.

Following fan campaigns for many years, an announcement was made that Dark Skies would receive a complete series DVD box set release in October 2007 (presumably for Region 1).

[6] Executive producers Bryce Zabel and Brent Friedman received permission from Sony to find a DVD releasing partner to put the series on the market.

However, three independent DVD firms, while initially extremely enthusiastic about doing so, also backed away after discovering the potential costs involved in licensing the period music.

Region 2 distribution rights were acquired by Mediumrare, with the full series being released on DVD in the United Kingdom on October 18, 2010.

[7] The series was successfully released in the US on six DVDs, including a number of special features (an hour-long "making of" documentary, and the never-before-seen pitch for the second season, among others) on the last disc.