The old Art Bell program may have featured the theme of "walk-ins" periodically. I believe the New Age guru Drunvalo claimed to have been a walk-in. Walk-Ins are supposed to be spiritual beings that manage to convince humans to surrender the use of their bodies to the disembodied entity. I believe the story went that the person's soul was freed to explore new realities while the entity inhabited the body from that time forward.
There was a woman named Karla Turner who worked with abductees for quite a few years. Her field was the hidden agenda of the aliens present on earth, primarily the greys:
In part of the lecture above, she states one reason for the abductions and gynecological examinations performed on human females involved the creation of clones of individuals. She stated some abductees that experienced multiple abductions over a period of years and later recovered memories of their abductions reported they had been warned to obey the commands given to them by the aliens, or their cloned bodies would be returned to the abduction point in their place. These women reported having been shown their own cloned bodies.
Academic institutions teach that most of earth's creatures are born with elaborate instinctual patterns ingrained in their neural system. These regulate the majority of the creature's behavior patterns. The human organism on the other hands is supposedly born as a blank slate. In this line of understanding, we have neural structures that regulate biological processes, a predisposition to learn languages and skills for interspecies communication, and higher cognitive functions that allow for symbolic reasoning, mathematical computations, and a sense of curiosity about the world and how it works. We have a herd instinct that is responsible for the societies we create, and a propensity to create religious systems.
I have no problem accepting this. In the same vein, humans undergo an extensive period of socialization. This includes acculturation into the consensual reality this is so blatantly manipulated through the propaganda spread through Fox News these days. The manipulation was more subtle when I was growing up, but the purpose and effect was the same: I was trained, and I learned to disbelieve what my senses and intuition told me. I learned to depend upon external authorities and submit my will to such external authorities.
Our culture is designed to suppress our human individuality so that we become content to lead lives that resemble the roles worker ants and worker bees play in their social hierarchies. This would account for why so few individuals amongst us might be considered "conscious." Living within self-made prisons, there are many souls that would choose differently for themselves, if they could. I would say there are quite a few who have "ears to hear" as recorded in the Bible. For these individuals, there awaits a moment that speaks to them that would awaken them to a different reality. As individuals, we all have the opportunity to play a part in this awakening of other souls. Usually it happens during chance encounters when we are least expecting any such interaction. At those moments we're able to act without invoking our mundane thoughts and worries; for a moment our inner being gets out of the way and we're able to act independently.
The "Matrix" series of movies gives an interesting overview of such a theme.