Sir James Braddock was a denizen of Otherworld, an other-dimensional realm. Merlyn sent James to Earth to father the champion, who would be known as Captain Britain. Arriving in England, Dr. Braddock became one of the United Kingdom's leading research scientists. James soon married and set up home in Braddock Manor. There, James created a highly advanced supercomputer he named Mastermind. Dr. Braddock and Mrs. Braddock had three children, Jamie Braddock Jr. (the eldest), and twins Brian and Elizabeth Braddock. When Betsy and Brian were in their early twenties, their parents were killed in an explosion, in Dr. Braddock's laboratory, caused by the malfunctioning computer Mastermind.