The footage of Earth destroyed by Cylons is actually from the film Earthquake (1974) with some Cylon fighters superimposed.

At one point some of the main characters are watching This Island Earth (1955).

In "Galactica 1980" (1980) (the TV series from which this movie is pieced together) the character of Dr Zee was played by Robbie Rist in the pilot, but was subsequently replaced by James Patrick Stuart. However, footage of both actors turns up in this movie. To get around this continuity issue, some lines have been re-dubbed to split Dr Zee into two separate characters. Rist remains Dr Zee, whilst Stuart becomes "Dr Zen".