The master criminal known as Egghead is one of the smartest men in the world, a genius by anyone's standards. With his great genius comes a great ego. He is forever talking about his own brilliance, and at one time he had his female companion Miss Bacon write down every word he said in order to record his brilliance for posterity in a book entitled "How To Be A Better Criminal".

Soon afterward, he met and became romantically involved with Olga, Queen of the Bessarovian Cossacks. They were engaged for some time, but Olga refused to marry him until he could provide her with a suitable dowry, which provided him with a reason for returning to crime.

His crimes usually had an egg-motif to them and he would use a wide assortment of egg-shaped weapons, such as laughing gas eggs and tear gas eggs (laid by chickens on a diet of onions) to accomplish them. Egghead would also speak in egg puns, where appropriate, such as "egg-zactly" and "egg-cellent."