Honorable mention:
— This Island Earth
— Gog
— Gattaca
Ha. I was going to say Gattaca. Also, Event Horizon.
— This Island Earth
— Gog
— Gattaca
The rural Virginia community in which I lived from 1961-1963 had but one TV station, and that station played an after-school movie. I think it used the "Dialing for Dollars" format.
They would show one movie per week, and would repeat it every day.
When Gog was shown, I watched it every day. I was really absorbed by it. Of course, I was only seven or eight years old.
It contained all kinds of scientific and technical subjects I was interested in, all tied together in a very weak plot.
Radar, remote control, atomic energy, spaceflight, centrifuges, death-rays, robotics.
The LASER had not been invented when Gog was made, so that magical acronym never appears in the movie, even though deadly heat rays zap objects and persons in several scenes.
In the end, the bad guys turn out to be the Communists, who had taken control of a secret government lab from a satellite in Earth orbit. An F-86 is dispatched to blow the satellite out of the sky, which is taken care of very quickly once the square-jawed scientist investigator is dispatched from Washington to look into what's wrong at the lab.
The lab in question was - I strongly believe - modeled after the Santa Susanna Field Station in the mountains east of Simi Valley, CA, which really was a secret lab back in 1954, when Gog was made.
Near SSFI (on the same mountain, I believe) is the Spahn Ranch, at which numerous Westerns and cowboy-themed TV shows were shot. It (the Spahn Ranch) is also where Charles Manson kept his "family."