Hank Henshaw, a renowned astronaut, along with three other space travelers, including his wife Teri, embarked on a mission on the Lexcorp space shuttle Excalibur. Unfortunately, this voyage was doomed, as a solar flare damaged the shuttle, exposing the crew to cosmic radiation. The ship crashed back to Earth, and two of Henshaw’s crewmates mutated into fantastic beings. It seemed at first that Henshaw and his wife were immune to any mutations. But this was not to be the case.
Henshaw hoped to cure his friends by using Lexcorp technology, but both of his friends perished. At this point, Henshaw, who so far only had his hair turn white as a result of the accident, began to deteriorate rapidly. His wife Teri began to fade out of existence, into an alternate dimension. With the help of Superman, Henshaw was able to use Lexcorp tech to save his wife Teri, but for him, it was too late. Henshaw died moments afterwards…or so it seemed at the time.
While Superman had nothing to do with the Excalibur crew’s tragedy, Henshaw blamed him still. Hank Henshaw’s body may have died, but his consciousness lived on, and bonded with the Lexcorp computer mainframe. At this point, he was able to download his consciousness into Superman’s birthing matrix, which was contained within the ship that brought him to Earth. Using the Kryptonian tech, he made himself a replica ship, with which he departed the Earth for parts unknown.
When Superman died battling Doomsday, Henshaw could not enact the revenge he so desperately wanted. So if he couldn’t kill Superman himself, he would tarnish his memory forever. Using bits of memory he downloaded from Superman’s birthing matrix, along with his DNA, Henshaw was able to build himself a replica body of Kal-El’s, one with visible cyborg parts. Now a “Cyborg Superman,” Henshaw was able to convince the world, even Lois Lane, that he was the real deal come back to life. To ensure the populace believed he was the real Superman, he committed several heroic acts.
Not long after, Warworld arrived in Earth’s orbit, and under Henshaw’s orders, Mongul used its destructive capabilities to destroy the town of Coast City, killing millions. At this time, the real Superman returned from the dead, and with the help of his allies, managed to destroy the Cyborg imitator, by vibrating his body to thousands of tiny pieces.
But Henshaw’s consciousness survived, and continued to come into conflict not only with Superman, but also the Green Lantern Corps. After a brief time with the android Manhunters, Cyborg Superman found that he only wanted the freedom that death would bring. But all attempts at destroying him ultimately failed, as his consciousness always survived. As long as he’s denied a true, final death, he will continue to plague the Superman and be one of his ultimate enemies.