In Part 4 of the NHI Origins miniseries, I examine the Interdimensional Hypothesis (IDH) as a possible contender for explaining the UAP phenomenon. From Jacques Vallée’s groundbreaking work connecting modern sightings with ancient folklore, to modern debates about high strangeness, simulation theory, and the role of consciousness, this episode unpacks the many ways the phenomenon may originate from realities beyond our own. The discussion asks what “interdimensional” truly means and whether what we interpret as metaphysical or paranormal could instead be advanced science that lies outside our current understanding.

I also explore different interpretations of the IDH, including parallel realities where evolution took alternate paths, ultra-dimensional creators who might serve as the architects of a simulated universe, and the idea that what we call “gods,” “angels,” or “demons” may be reinterpretations of the same phenomenon across different eras. Cases of high strangeness, reports of portals or gateways, and theories involving orbs and perceptual manipulation are weighed not only as possible evidence of interdimensional origins, but also as effects of technology interacting with human consciousness.

Ultimately, this episode emphasizes the importance of keeping every origin possibility open—extraterrestrial, ultraterrestrial, extratempestrial, cryptoterrestrial, and interdimensional—without dismissing or prematurely endorsing one over another. Whether the phenomenon is genuinely interdimensional, merely appears that way, or reflects something else entirely, the IDH remains a powerful lens through which to examine UAP and NHI. The episode concludes by setting the stage for the final installment in the series: the NHI Origin Likelihood Chart, where each hypothesis will be graded and compared side by side.