Jason King is an agent for Department-S.
Long before Scully and Muldar investigated cases from the X-Files, Jason King and his associates checked out bizarre and unusual matters that affected international peace and security. Working for an organization called Department S, connected somehow with Interpol, King worked for Sir Curtis Suretse along with an American named Stewart Sullivan and a fellow Brit named Annabelle Hurst. They operated out of Paris though their missions took them to strange places.
The two-book series about this hero has a slightly strange lineage, which considering all the facts is rather appropriate. In 1969, ATV brought to British television an hour-long adventure series about the people of Department S. It contained 28 episodes and lasted one season. The cases were strange, captivating, and confusing but of even more fun that the missions were the characters themselves. The actors made them highly entertaining.
Starring as King, who was just one of the three main agents for the group, was the experienced actor Peter Wyngarde. His portrayal of the character was intriguing enough to both the producers and the audience that when the series concluded its single season, they gave the character/actor his own show. In 1971, King was back, now having left Department S. This series also lasted one year with 26 episodes.
Jason King was a bon vivant, a raconteur, and probably many other French phrases. He loved the good life and made the most of it, paying for it by being the author of a best-selling adventure series about a character named Mark Caine. When he left Department S to go off on his own, it was to gather research material for these novels that King traveled about the world and got into all sorts of trouble. Often this trouble was Department S-related as he was often cajoled or simply forced into returning to his own line of work.