Melvin Practice is the conniving science officer (and mad scientist, though he prefers the term, "sanity-challenged scientist") of the space station R.U. Sirius. He often creates monsters and machines (killbots), but inevitably fails in his plans to conquer the universe. One of his craziest inventions was a "Procrastination Ray", which sent troublesome objects into the future, so one would have no choice but to deal with them later. He is bald and wears a white lab coat, black gloves, and spectacles.