Stephen Hawking narrates his own search for a single theory that could unify the physics of the very large with the physics of the very small, across a ten-part BBC Four series filmed as he approached retirement from Cambridge. The films follow him through the phenomena that make the case for a Theory of Everything: supernovae, black holes, and dark matter on one scale, and the probabilistic strangeness of quantum mechanics on the other, with other working cosmologists brought in to argue the current state of the field. Archival material and interviews trace how a diagnosis expected to kill him within years instead ran alongside a five-decade career, without turning that into the film's main subject. Hawking states his own stakes directly on camera: after twenty years working the problem, he still wants answers to why the universe exists at all and whether it needs a designer. The series treats that question as open, using each physical concept as evidence toward an answer rather than a settled conclusion.