Dr. Robert Crane and his assistant Chuck Grayson worked for years on perfecting a mechanical body that could sustain a human brain after the human body was unable to continue supporting the brain. Criminals found out about Crane's experiment thinking that it could provide a form of immortality and that people would be willing to pay high prices for the highly articulate mobile "iron lung" they tried to steal it and then tried to force Crane to tell them how to operate the robot. Crane refused and attempted to escape. The gangsters shot Crane in order to stop him from turning them in. Seeing their plans ruined the crooks fled leaving Crane to die.  The robot was so heavy that they could not take it with them and without the knowledge to make it work they could not sell it. Seeing that Crane was about to expire completely, Grayson transplanted Crane's brain into the robot body successfully. Robotman let the world believe that Crane was dead and adopted the human alias of Paul Dennis.
Grayson testified at Robotman's trial, which was to determine if he were human or property. He revealed to the courtroom (including Crane's fiancee) that Robotman was, in fact, his old friend Robert Crane.
During the War, Grayson was a member of Project M, a special program specializing in psychological warfare. During May, 1942, Grayson meets with the Young All-Stars to help analyze Fury in an effort to rid herself of the Blood Avenger or "Tisiphone, the blood avenger, who punishes crimes of kinship." 
When Grayson died he had his body frozen to donate it to Crane in order to return to human life. Robotman had been trapped and buried by a criminal named Lashky. Going into an emergency suspended animation mode, preserving his human brain, he remain trapped for several decades until just before the current age of heroes when he was freed and captured the criminal, now an old man. When Robotman was finally able to free himself from his decades long imprisonment, he chose to live a few years as full human rather than potentially forever inside his mental shell. Robotman's brain was then transplanted into Chuck Grayson's body, possibly by Niles Caulder, and Dr. Crane started his new life as a human being.
Powers and AbilitiesEdit
Genius level intellect, as he, with Crane, developed a successful method of transplanting a human brain into a robot body in 1941.
- 26 Appearances of Charles Grayson (New Earth)
- 2 Images featuring Charles Grayson (New Earth)
- Quotations by or about Charles Grayson (New Earth)
- Character Gallery: Charles Grayson (New Earth)
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