A mysterious mastermind known as "Mockingbird" assembled six individuals... one of which was himself... in order to combat communism and crime. This team consisted ace pilot King Savage, Vietnam vet Mike Tempest, government researcher Dr. August Durant, stage magician Carlo di Flenzi, French film star Lili de Neuva and fashion model Kim “Crimson” Dawn. After several tales, this team known as the Secret Six disappeared and its members resumed their old lives once more.
Bart Regan was a spy for the United States government who worked first for the Secret Service before graduating into becoming the nation's premier undercover counter-espionage agent. Regan was cirected by “The Chief”, with fellow agent Jack Steele, former defector Jules Vortez, and fellow spy Olga Barnoff, as well as his fiancée Sally Norris who became his coworker before the two married.
Then there was King Faraday and Steve Carson who were the primary federal men of note on Earths One and Two respectively.