Stephen Fletcher is an agent with British Intelligence.
A tall man described as having a "strong, tanned face, black hair, and steel blue eyes which belied his toughness", Fletcher is in his early thirties when we first meet him. He is considered "quite handsome" with "a deep resonant voice and a confident manner".
A British citizen via his Scots father as well as having Greek citizenship thanks to his Greek mother, Fletcher had been born in Greece and "had spent his childhood and youth in the consulates of the Balkan countries". His formal education in foreign languages at a university in Turkey was paid for the Foreign Office and from the time of his graduation he had been employed by MI6.
"The Balkans were his home and his own particular responsibility. He moved freely through the various countries as if boundaries did not exist, and his contacts were many and varied." Toss in the Greek isles as well as Turkey's Asia Minor and you get a sense of his area of expertise.
Operating out of Athens, his familiarity with the region allows him to move freely and blend in easily. Less easy are regions such as the Levant and North Africa but he knows enough to cope anywhere.
Very little of Fletcher's background or his personal life is revealed in the short series but what is shown is his determination to come through regardless of the obstacles. Whether it is going undercover deep inside the Iron Curtain with no one to have his back or in the alleyways of Cairo where those behind you could just as likely stab you there as help you, he knows that he has to rely only on himself and he is comfortable at doing that.
What is known is that Fletcher is good with a gun and a knife and pretty capable of handling himself in a fist fight. He is not afraid of charging into a dark alley at night or entering a bar filled with low lifes or going into a Warsaw Pact country pretending to be someone else. Fear is not a stranger to him but Fletcher is apt to ignore it while he gets the job done.