Frivolous Lawsuit: Lucasfilm tried to sue Universal, claiming that Battlestar Galactica represented a copyright violation of Star Wars. Universal then countersued, claiming that Star Wars was itself a ripoff of Silent Running (!).
Had "Galactica 1980" not been cancelled, they were planning a sequel to "The Return of Starbuck", showing him having a somewhat happier fate. Additionally, both Apollo and the Ship of Lights was to have played an important role in the rest of the series.
Glen Larson, the show's creator, is a Mormon, and deliberately peppered the series with Mormon imagery. For example:
The main world of God, in Mormon theology, is named Kolob. The human homeworld in Galactica is named Kobol.
Ancient Egypt factors strongly into Mormon theology. The Viper pilots' helmets were designed to resemble King Tut's mask, and Kobol is shown with Egyptian pyramids on it.
Mormons have an eternal marriage ceremony called "Sealing". Getting married in the Galactica universe is called getting sealed.
In the history laid out in the Book of Mormon, a "lost tribe" of Israelites sailed to North America and became the native Americans. Galactica is all about finding the "lost 13th tribe" of humans who colonized a remote planet named Earth.