Space 1999 the movie

Continuing the theme mystery, who does not remember this series? I remember well, also because ‘I have the entire first series in “DVD.” The second part only, though, I think the first series unsurpassed.
A production by the first Anglo-Italian, I remember that sometimes in some scenes I closed my eyes for a few seconds, the second American and out of phase with the previous one.
The symbol then was fantastic.
Great novelty ‘that the moon leaves Earth orbit and begins to wander around the space, no longer’ find their way home, encountering aliens eager to put the “hand” on the human race.