Doctor Manhattan

Jon (Jonathan) Osterman, an atomic physicist, is caught in a laboratory accident at a research base (Gila Flats) while working on 'intrinsic fields.' He is torn apart by a test generator and over the following months gradually reforms, reappearing as a transformed being. The U.S. government assigns him the code name 'Doctor Manhattan'—an explicit reference to the Manhattan Project and atomic-era science—which positions him as a strategic asset within the Cold War-era fictional polity.

After reforming, he appears as a blue-skinned man, described as glowing with a 'flare of ultraviolet.' He adopts an emblem on his forehead: a representation of the Bohr model of hydrogen, which he declines to display on a helmet and instead 'painlessly burns the mark into his forehead.' Over time he increasingly forgoes clothing, refusing to wear it except for mandatory public appearances; his visual presentation is intended to signal altered, non-ordinary physicality while still resembling human form.

Within the narrative he can observe and manipulate matter at the subatomic level and exert control over the intrinsic fields of physical objects. His existence has major geopolitical consequences in-story—analysts and the narrative state that his presence 'tips the balance of the Cold War in the West's favor' and the government uses him as a strategic instrument, including at the request of political leaders. Creator commentary indicates Alan Moore conceived the character to reflect quantum-physics themes and argued that a character 'living in a quantum universe' would not perceive time linearly; this authorial construction is used in the story to explain Manhattan's increasing detachment from human concerns and attachments.