which is still pretty good, but “quatermass and the pit” (the bbc-series, the movie of the same name is just schlock) is truly genius and to this day one of the best SF ever written and put to screen
great story, great actors, sometimes even superb acting and full of surprises. cant get enough of it and I have to see it at least once a year.
(hint: you can find the whole series in extremly good quality at archive.org)
the plots were lousy, but at least in this case they had a sort-of “logical” explanation for it:
Not long after leaving Earth’s Solar System, the wandering Moon passes through a black hole and later through a couple of “space warps” which push it even further out into the universe