All of the Thinker's special powers are the result of a hi-tech helmet, which has been the central part of his arsenal for many years. This custom-made headpiece increases the wearer's psionic abilities to an astounding degree. Among the many effects possible are:
Law Practice * Criminal Planning
The Injustice Society of the World
In 1933, Keystone City's brilliant district attorney Clifford Devoe prosecuted bootlegger Hunk Norvock, but was unable to obtain a conviction. Embittered by his failure, Devoe decided that crime did pay, and went to Norvock and made a strange deal: Norvock would provide Devoe with the necessities of life and in exchange for this, when some seemingly impossible task arose that Norvock needed accomplished, Devoe would use his great intellect to perform it.
Ten years passed, during which Devoe devised numerous schemes for committing seemingly perfect robberies and murders. Finally, in 1943, the original Flash captured two of Norvock's underlings, who signed a confession that would be used as evidence to send Norvock to prison for life. On Norvock's request, Devoe killed the two underlings and destroyed the confession. Fearing Devoe would try to take over his rackets, Norvock tried to kill him, but -- as the cunning Devoe had arranged -- Norvock fired his gun at a reflection in a steel mirror. The bullet ricocheted and killed Norvock, whose gang made Devoe their new leader.
Devoe led his new gang in committing crimes in order to match his wits against the Flash. The Flash defeated and captured Devoe, now known as the Thinker, on this and later occasions. The Thinker also met defeat as a member of the Injustice Society of the World.
Years later, the original Flash came out of retirement to battle the alliance of the Thinker, the Fiddler, and the Shade. By this time the Thinker had either obtained or recreated the "thinking cap" originally invented by Professor Hartwell Jackson which had been stolen from Jackson years before by gangster Tricky O'Rickey, but was returned to its inventor by the original Flash. The Thinker has made improvements upon the cap's original design which enables its wearer to project psionic energy, and has used it in all of his criminal activities in recent years.
The Thinker later modified his helmet and added a battle costume. He then took to more spectacular crimes only to suffer defeat at the hands of the original Atom. He also met defeat after tangling with the Atom and his modern-day counterpart. The Thinker is currently in prison.