Jack Knight is a tattooed man that owns an antique/junk shop in Opal City. He knows a great deal about the objects in his store and collectibles in general. He has a son.
Starman's the third man to take on the name and a rather reluctant hero. Son of the original Starman, he took up the name after his brother was killed. He upgraded the Gravity Rod into the far more powerful Cosmic Rod and was a beloved defender of Opal City.