Curiously, they ran the pilot 2-hour episode at the movie theaters back in 1979, which my father took me to see. It managed to make $21 million in North America at the time (about $73 million today), a tidy sum for what was just 2 tv episodes.
I saw it first at the AAFES theater at Camp Hovey in 1980 when I was stationed at Camp Casey.
Interesting fact about Camp Hovey in 1980: the theater was located in the middle of three buildings -- the base library was on one side and the base massage parlor was on the other. Depending on how you wanted to spend your evening, Camp Hovey had it all ...
Further note: when I was assigned to an encore performance at Camp Casey in 1988, the on-post massage parlors were all gone ...
IIRC, they did the same with “Battlestar Galactica”.
You could double dip like that back in the 70s.