Department S is a sub-organization of Interpol.
The agency has its offices in Paris rather than the main headquarters in Lyon. It is run by Sir Curtis Seretse, an African man whose experience seems extensive and his contacts and his reach even greater. It falls to Department S to handle the cases that other agencies or departments, inside its parent Interpol or in the various national police forces of the member countries, cannot handle. This invariably turns out to be polite talk for the odd, bizarre, strange, and uncanny. Even more to the point, Department S is who to call to handle the "unsolvable".
Exactly how many agents report to Seretse is unknown but the action inside the recorded adventures are handled by a highly skilled trio.
Stewart Sullivan is an American, formerly with the F.B.I. and now a Department S operative who answers to Seretse directly. The relationship he has with his boss is respectful but close enough for him to be very at ease around him. Then again, Sullivan is self-assured enough to be comfortable around anyone. He is good looking, apparently in his mid-30s, quite capable with his brain, fists, and his aim.
Annabelle Hurst is a computer expert and data analyst who seems far more at home with reams of data sheets and computer printouts than she is with other humans. She is not standoffish per se and she has the requisite amount of people skills but it is obvious her safe zone is inside the number-crunching.
Jason King would like to think others thought of him as the idea man which he certainly does himself. That bit of self-congratulation is brought on by the fact that he truly does come up with the ideas and he is commonly dead on, much to the amusement of Sullivan and the annoyance of Hurst. King is in his early 40s and looks every bit his age as, despite being in good enough shape to take care of himself, usually, he is seldom seen without a drink in his hand (bourbon, if you have it). He is the epitome of style, extremely well dressed with his long hair always coiffured properly. He is also quite well off due to his impressive success with his adventure novels about Mark Caine. He will at times use ideas from the Caine novels to help with a mission and witll invariably use ideas from a mission in future Caine tales.
Interesting lines:
Jason King, The Six Days, to Annabelle, "One of the cankers of science is its incestuous obsession with itself; science for science sake."