The idea of a holographic universe is seductive. A physical hologram encodes information in a way that allows the larger image to be reconstructed from only part of the recording. During the twentieth century, that strange property inspired physicist David Bohm, neuropsychologist Karl Pribram, and later writer Michael Talbot to explore radically different possibilities about reality, memory, consciousness, and the relationship between parts and wholes. But the phrase "holographic universe" eventually came to conceal several distinct ideas. Bohm used holography as an analogy for his implicate order and a deeper, dynamically enfolded reality. Pribram developed a more specific neuroscientific model involving distributed representation, receptive fields, spatial-frequency processing, and transform-like operations in the brain. Talbot combined these ideas into a much broader worldview incorporating paranormal phenomena, mystical experience, healing, consciousness, and death. Decades later, theoretical physics developed its own holographic principle through black-hole thermodynamics, quantum gravity, and bulk-boundary duality—a scientifically important development whose principal historical and mathematical genealogy is substantially independent of Bohm and Pribram. This investigation separates these different meanings and asks what actually survived. Bohmian mechanics remains a legitimate program in quantum foundations, but Bohm's broader implicate-order ontology is not established by its empirical success. Pribram anticipated important features of distributed and transform-like neural processing, but contemporary neuroscience does not require a literal holographic memory mechanism. Talbot preserved genuine scientific and philosophical ideas while extending them into domains requiring independent evidence. Modern holographic quantum gravity is mathematically substantive but does not vindicate the popular claim that our universe is literally a giant hologram. The deeper lesson concerns how evidence travels. Scientific results can inspire models; models can inspire ontologies; ontologies can become metaphysics; and metaphysics can begin answering questions about consciousness, purpose, death, and ultimate reality. At that point, a scientific image may begin functioning as something more: a secular theology.