In Episode 3, we complete the puzzle of our ancient skies. We break through the spheres that defined our skies for millennia, abandon the long-held idea of circular orbits, discover new neighbours in our solar system, and begin to comprehend the enormity of our ever-growing universe. Even though science seems to have permanently banished the gods and monsters of the past, we also discover how we continue to unleash our imaginations on the skies and wonder whether we truly are alone after all.