A sickly but wealthy Washington D.C. businessman, Hewitt Corporation CEO Henry Hewitt incorporated nuclear technology in several attempts to gain power and control over his medical condition. To that end, he mutated Lorraine Reilly into becoming Firehawk, sending her in a confrontation of the ultimate test subject in Firestorm. After her mutation was successful, he utilized it on himself and within his containment suit gained magnetic powers as Tokomak the Human Reactor, although he eventually perished.
Similar exposure to magnetic currents effected the mind of Percival Playboy (Plazchek) and turned him as evil as his counterpart. He too assumed an armored alias as Nuclear the Magnetic Marauder. Initially being drawn into conflict with first Wonder Woman and her beau, Steve Trevor, and then the All-Star Squadron. Nuclear was eventually defeated in the bowels of his ocean side mansion when the Amazing Amazon teamed up alongside the All-Stars to vanquish the villain, seemingly once and for all. However, Nuclear returned years later to seek profit from a sea going vessel, and yet was once more defeated by the Wonder Woman.