Conrad Leuenberger met Albert Einstein when he was nineteen, and it was a meeting which forever altered the direction of the boy's life. He was involved in the top secret Pittsburgh Project from 1956-1958, firstly as a college student attached to Professor Michael Donati and later in his own right as a graduate with extraordinary insights into physics, especially magnetism and the gravity. The Pittsburgh Project was one of the United States' initiatives charged with investigating the existence and use of anti-gravity. He later went on to work with the Gravity Research Foundation, and although there had been no viable breakthroughs in either project, Leuenberger had already begun to achieve quite a reputation for 'thinking outside the box'.

By the late 1960s the American government was growing disheartened by the lack of results, but on December 3 1968 Leuenberger finally managed to produce a stable anti-gravity device - a pair of disks which seemed to negate the effects of gravity. He was quickly drawn into a struggle against his assistants, who were actually a group of C.L.A.W. agents who had infiltrated the installation several years before. Like the US Military, it seemed that CLAW was interested in any anti-gravity developments. Leuenberger evaded capture and took his two anti-gravity disks to safety.

At thirty-three Leuenberger felt that his whole life had been focused on developing the anti-gravity disks and now that he had achieved success, he suddenly felt the tinge of selfishness surface. The current American government had constantly spurned his research and over the course of a decade had effectively cut off all funding for the project. Leuenberger had sacrificed all outside life for the project, including the love of his childhood sweetheart and opportunities to teach at leading universities.

As he sped through the night on his anti-gravity disks he had an epiphany: the technology would never be commercially viable, not in the way that the US Military had in mind; so in all likelihood his disks would be dismantled or catalogued and put into secure storage. That seemed like such a waste.

Inspired by the exploits of uberhumans across the world, but most notably in the United States, Leuenberger decided he'd use his extraordinary scientific discovery to infuse the young Americans with a sense of wonder for science, as well as to bring law and justice to those who sought to undermine the rights of others. He dubbed himself Doctor Plenary and began a career fighting crime between New York, Philadelphia and Washington DC.

During the 1970s Doctor Plenary spent an extended period in Europe where he met and teamed-up with Solar Centurion on several high-profile adventures. Leuenberger and Vito Musculla became close friends, a fellowship of shared intellect and interests in the emerging superhero world. Musculla even considered Leuenberger a mentor and de facto father figure.  It was also during this time that Leuenberger began to find himself questioning his role in America and as a result he turned to the faith of his early years. He visited the Vatican and was allowed an audience with Pope John Paul II. Although it is not widely known what the topic of conversation was, it is known that from that day onward, Leuenberger began to withdraw from the public arena. His exploits dwindled until in 1980 he was barely seen at all.

At the behest of the Pope, Leuenberger had begun to reform the Sanctity team which had briefly appeared following the Second World War but had never really lasted. The new Sanctity would be a world-wide force, determined to promote the ideals of Catholicism and to provide both role models and protectors to the Catholic people.

Leuenberger argued vehemently with Solar Centurion over the change in direction and the two men were never able to reconcile. Musculla distrusted the Vatican's moves to form a super hero team, and Leuenberger found himself personally offended by Musculla's distrust.

Regardless of his falling out with Solar Centurion, Leuenberger managed to successfully re-launch the Sanctity team and led it for two years until 1982, after which he served in a support role for another six years. In 1988 he retired at the age of 53, happy to have had the opportunity to do so on his own volition. While he no longer works directly with Sanctity he remains living in Rome and can be sought out for advice and stories of the olden days.

Doctor Plenary was a wide-eyed, overly enthusiastic scientific genius. He embodied the wild possibilities science could offer, and in his sleek 'science armour' he inspired many young Americans into a life of science. In his pursuit of science, and in particular the exploration of anti-gravity, Leuenberger neglected his personal life which was something he later regretted.

Later in life he came to accept his solitary life and although he maintains several important and close friendships he seems to be content to life out the rest of his life in his own company. He became a deeply religious man and the comfort he received from that has helped him adjust to life after being a superhero.

"There have been three great teachers in my life: God, Einstein and Experience."

Leuenberger's anti-gravity disks have been his major success. The silver disks have a 40cm diameter and are 5cm thick, the centre of which contain the intricate anti-gravity circuitry which he patented. While he developed other items over the years it is his anti-gravity disks which remain the only really successful invention. They enable the wearer (rider) to fly and assist with balance by adhering to the person's specially-designed shoes.

The science armour provided limited protection from conventional firearms and other hazards which became common in the life of a super hero during the 1970s and 1980s. A later addition to his outfit were silver bracelets which utilised a subtle magnetic field and enabled him to deflect most ranged attacks, and in some cases to even redirect the attacks. This became especially effective against energy-projecting uberhumans such as Bad Science who plagued his career.

Conrad Leuenberger had white hair from the age of thirty, and always kept it short. His eyes are piercing blue and have the unerring ability to hold a stare beyond what should be physically possibly. It was suggested during his tenure with the Pittsburgh Project that he never slept and never blinked because he thought he'd miss something, some new development. It is true that his enthusiasm for science often borders on the obsession, but as he grew older this enthusiasm became less concentrated on hard discovery and more linked to a desire to understand everything around him, both physically and spiritually.

As Doctor Plenary he wore a specially designed science armour which was light blue and silver. He was always tinkering with the design, especially the force field belt, so the look of his uniform seemed to change annually.

In the present day, the aging Leuenberger still retains his white hair and blue eyes, but he would never fit in his science armour again. Instead he tends to wear trousers and cotton shirts (with the occasional cardigan or jacket depending on Rome's weather).