
"The picture opens with the arrival on Earth of sex extra-terrestrial characters. They are from a dying planet and are looking for a new home. They are wraith-like energy-beings who are parasitic on matter-beings. On board ship they are occupying matter-beings from their own world. The nature of these creatures is not important; but they may be lizard like."
So began legendary sci-fi author Isaac Asimov's 'preliminary treatment' outlining the plot of a musical film with the working title Five And Five And One, based upon an original idea by former Beatle / Wings frontman Paul McCartney.