Jacques Vallée occupies a singular and contested position in the hidden record. A trained astrophysicist and computer scientist who co-developed ARPANET's predecessor, Vallée's credentials are impeccable by any institutional standard — yet his conclusions place him squarely outside both mainstream science AND the pro-ET-hardware camp. His 'Interdimensional Hypothesis,' first formalized in 'Passport to Magonia' (1969) and expanded in 'The Invisible College' (1975), argues that UAP phenomena pre-date aerospace technology, correlate with folklore, religious apparitions, and shamanic encounter — and behave like a 'control system' modulating human consciousness across centuries. Richard Dolan has acknowledged Vallée as the most methodologically rigorous analyst in the field, praising his early cataloguing work (which preceded Project Blue Book's own). Remote viewer Ingo Swann, in personal correspondence cited by researcher Alexis Brooks, noted Vallée's interdimensional framing aligned with what Swann encountered in SRI's classified Stargate sessions. Hal Puthoff — Vallée's colleague and SRI Stargate co-architect — has publicly confirmed Vallée was read into classified UAP study programs, including To The Stars Academy briefings and the predecessor AAWSAP effort. Luis Elizondo, in a 2021 interview with researchers at The Black Vault, referenced 'consciousness interaction' effects in UAP encounters consistent with Vallée's control-system model. Vallée's TTSA-era work on 'meta-materials' — isotopically anomalous magnesium-zinc-bismuth layered samples — represents arguably the first peer-reviewed physical-trace UAP analysis by a credentialed scientist. Researcher Diana Pasulka, in 'American Cosmic' (2019), describes Vallée under the pseudonym 'Jacques' as deeply embedded in a clandestine network of scientists operating entirely outside official channels.