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. Several of the past years had been as an agent, concentrating his efforts in the southern Balkans, Greece, and Turkey. 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.
Note: A book by the name Nest Of Spies, published in 1968, may come between the two books listed in the Fletcher series but I have not yet verified it.