Professor Paradox is a time traveling professor who can travel anywhere in space or time, within reason. While he forgot his true name from centuries being trapped in a separate reality, he now goes by the name "Professor Paradox," after taking a liking to being referred to as such.
At some point he was working for Area 51. It's not known what his job was exactly, but it had something to do with the alien prisoners there.
In the 1950s, Paradox, having discovered special properties in quartz crystals, received government funding to break a hole in the space-time continuum. However, a slight miscalculation, and an explosion accidentally caused by his panicked assistant Hugo, threw Paradox into the event horizon, where he remained for a hundred thousand years. He was displaced outside of time, where he didn't age, or have to sleep or eat; just exist. He went insane for a while, but then got bored and regained his sanity. He gained complete understanding of the space-time continuum, though he forgot his original name in the process.