Twice-Told-Tales: Medical Miracles of the Caped Crusaders

These strikingly similar twice-told-tales involved shrinking superheroes... performing delicate procedures from within their patients... victims of criminals seeking to conceal their crimes from those who could expose them.

In 1943 on Earth-Two, Doctor Charles McNider was made the executor to a man named Jamison's estate. Among the items in his possession was a shrinking ray projector developed by Jamison, which McNider replicated. Soon after, McNider was called to a hospital to recommend treatment for a gunshot victim, a detective ambushed by crooks. While unable to perform an operation himself, as he was legally blind, McNider secretly had the superhuman ability to see in complete darkness as well as infra-red googles allowing him to say in daylight was well. Requesting his "friend" Doctor Mid-Nite to perform the surgery on his behalf, Charles as Mid-Nite shrunk down to microscopic size, bringing with him his homemade portable projector. Navigating through the near-death police man's body, the Doctor finally arrived at the man's heart where he used the shrinking ray to reduce the size of the bullet lodged within it. 

In 1974 on Earth-One, social activist Debbie Manton is kidnapped by criminals in the employ of gang-leader Bugsy Cathart, as she had witnessed his slaying of a competitor. Tracking down Cathart's goons to a building, Batman unwittingly was stunned by an electric current as he swung onto its rooftop ledge. Left for dead, the Caped Crusader was retrieved and brought to a Gotham City hospital, where he was pronounced near-brain dead. Called to consult on his case, visiting physicist Ray Palmer hypothesized that by using his white dwarf shrinking belt, he could stimulate Batman's brain from within as the Tiny Titan known as the Atom.  

Reviving the detective, a now full-sized Mid-Nite learned from his patient that critical evidence was discovered that would expose gang-leader Clipper Jackson. Cornering Jackson and his henchmen, the Doctor was able to bring the crook to justice.

Piloting Batman's body from within his brain, the Atom was able to reactive the Gotham Guardian's  subconscious reflexes, and together they were able to rescue Debbie. With her testimony, the crook was brought to justice.

Interestingly, Doctor McNider still possessed this shrinking technology which was remarkably similar Ray Palmer's, yet unlike the Atom of Earth-One, Mid-Nite neither used it himself nor did he bequeath it to his Justice Society colleague Al "Atom" Pratt. Instead, Al-Atom wore a dimensional-vibrator device in his belt, something Ray-Atom also developed but used only once.

Regardless, the fact that such a technique was successful and such science was available highlights the amazing accomplishments within the DC Multiverse!