Name: Cyclotron
Universe: Earth-2
Alter Ego: Terrence Curtis
Occupation: Research Scientist
Marital Status: Widowed
Group Affiliation: None
Base of Operations: New York City
Known Relatives: Unnamed wife (deceased), Terri Rothstein (daughter), Philip Rothstein (son-in-law), Albert Rothstein (grandson)
Height: 5 ft. 11 in.
Weight: 182 lbs.
Hair Color: Brown
Eye Color: Blue
First Appearance: Action Comics #21

History:
A brilliant scientist who secretly split the atom in mid-1939, Terry Curtis was kidnapped by the villainous Ultra-Humanite and forced to participate in Ultra's attempt to blackmail Metropolis. With Terry's aid, these plans were thwarted by Superman and the young scientist returned to his research.

Over the next few years Terry continued his atomic experiments, taking time out to marry and then sire an infant daughter. In late 1941 one of those experiments somehow went haywire, killing Terry's wife and fatally irradiating both Terry and his infant daughter, Terri.

A few days later Terry was once again contacted by the Ultra-Humanite, who offered to use his futuristic machinery to save both Curtises on the condition that Terry would work for him. Seeing no other alternative, the distraught scientist agreed to Ultra's terms.

Ultra fulfilled his part of the bargain, using his machines to stabilize the infant Terri's condition, then adjusting those same machines so that they altered the atomic radiation in Terry's body, giving him various atomic powers that he could use to Ultra's benefit. Giving Terry a stylized costume and dubbing him Cyclotron, Ultra sent his reluctant agent out to steal an ancient object called the "Hammer of Thor".

In the course of this robbery Cyclotron came into conflict with members of the heroic All-Star Squadron, including his ex-fiancee, Danette Reilly, now known as Firebrand. While attempting to escape from the All-Stars, Cyclotron accidentally killed a policeman and was consumed with guilt. Later, when this guilt became more than he could bear, Terry grabbed the Ultra-Humanite just as that fiend was preparing to slay the All-Stars and flew high into the stratosphere, where he allowed his atomic energy to detonate, blowing both himself and Ultra, so he thought, to atoms. Terry Curtis died the sort of man he truly was. A hero.

Firebrand and the Atom, who had himself been irradiated during an earlier battle with Cyclotron, took it upon themselves to find a cure for Terry's daughter and then raise her properly. Though ultimately cured of her radiation poisoning in an as-yet undisclosed manner, Terri Curtis passed the effect of that radiation on to her own son, Albert, which led to his becoming the super-hero known as Nuklon.

Powers:
As a result of the Ultra-Humanite's changing the atomic radiation that was slowly killing Terry Curtis, Cyclotron possessed a number of super-powers, including super-strength, the ability to negate gravity so he could fly, and the power to generate so-called "atomic bursts" that could level buildings and transform the molecular structure of solid matter, whichever Cyclotron chose.

An average athlete and hand-to-hand combatant, Cyclotron used his powers only with great reluctance.