It's a funny paradox to look back on classic science-fiction films. In one instance they prognosticate a future that, in most cases, has already happened. Additionally, whilst venturing into futurity, they can't help but be time-capsules of the era they were made in.
But good science fiction, no matter when it it was made, remains timeless as it abides by the genre's willingness to explore the human condition in imaginative creative speculative ways. To find hidden treasures buried beneath the many blockbusters we know and love is a treat for any fan of the genre. That being said, it's quite hard to determine what is and isn't lesser-known, particularly when writing for such film-buffs as yourself. I can only define it as a film that does not usually circulate within the circuits of conversations amongst us cinephiles…"