Atomic Knight is a superhero appearing in American comic books published by DC Comics, and was briefly a member of the Outsiders team. He is sometimes depicted as one of a group of Atomic Knights, which first appeared in Strange Adventures #117 (June 1960) and ran quarterly in that monthly comic up through #160 (January 1964).[1]
Sergeant Gardner Grayle was portrayed by Boone Platt in the live action Arrowverse series Black Lightning in the third season.