Jack Knight came from a dynasty of Super Heroes. His father was World War II Super Hero Starman, and he was also related to the first Phantom Lady. However, he was content to let older brother David wield the Cosmic Rod as champion of Opal City. Jack preferred to pursue his love of history and popular culture. That all changed after David was assassinated. Jack Knight became Starman only after David's murder was followed by an attempt on his own life. Using a prototype staff his father had discarded, Jack vanquished the killers and became the city's protector. Despite reservations, he was drawn to the life of adventure and exploration, although he refused to wear a costume.