Doctor Manhattan (Jon Osterman) is a fictional character who appears in the acclaimed graphic novel miniseries Watchmen, published by DC Comics in 1986 and 1987. Doctor Manhattan was created by writer Alan Moore with artist Dave Gibbons.
Dr. Jon Osterman is a nuclear physicist, who in 1959 is transformed into a blue-skinned, radiated powerful being after initially being disintegrated in an Intrinsic Field Subtractor and later reconstructing himself. Following his reanimation, he is immediately pressed into service by the United States government, which gives him the name Doctor Manhattan, after the Manhattan Project. He is the only character in the story that possesses actual superpowers.
The Watchmen series has been noted for addressing metaphysical issues and questions, Doctor Manhattan being the primary recipient. He is often used as an example of a posthuman god and as a primary example of the potential side effects of superintelligence.
Reception towards the character is positive, and he has appeared and has been mentioned in various forms of media. Billy Crudup portrays Doctor Manhattan in the 2009 film adaptation directed by Zack Snyder. Doctor Manhattan later appears in the Before Watchmen comic book prequel, with his own individual issue miniseries.