Cancellation
The weekly series ran for one season, from 1989 through 1990, and was one of the few successes the fledgling Fox Network had at the time. However, the network suffered from financial shortage caused by lower-than-expected advertising income. As a result, Fox executives cancelled all of their dramatic series for the 1990–1991 season. A second season of Alien Nation was clearly expected by the producers, as the season ended with a cliffhanger. The show built a strong fan base, and popular demand led to "Dark Horizon", the episode that would have begun the second season, being novelized and adapted as a comic book as well as spawning a series of novels. Four years later, after a change of management at Fox, the story of Alien Nation continued with five television movies (including all the original cast), picking up with the cliffhanger.
Read more about this topic: Alien Nation (1989 TV series)