Bob Fleming is an agent with the CIA.
When we meet him, in a promo for his first recorded adventure, we are told that "he's the action man. All kinds of action [picture here a gorgeous red-haired woman being loved by Fleming]. A go-er. Secret Agent Fireball!" That is how the trailer for it starts. It then takes a bit of a downturn when we find his Director admonish him with "don't you dare come back if you let those Russians get their hands on that microfilm." To accomplish this, he is "given a free hand ... and a license to kill!" "His territory - Paris, London, Hamburg, Beirut. The world's capitals of intrigue where the cheapest thing is life." It goes on to tell us "Here attractive women woo wanted men into death traps and then find themselves victims of counterespionage" [it does not go well for the poor woman]. And, "he goes where the action's the hottest!!"
At some times (mostly on posters for the adventures in the various languages in which it was dubbed) he has the designation of but at others he is designated X-177. The reason for the difference is not unknown but I would feel more confident looking up X-177 in the CIA dossier files than the other.
Fleming is a tall, suave, always calm and cool individual who has a ready smile for a lovely lady and a closed fist for annoying henchmen. He appears to be in his very late 20s or early 30s in the adventures we have of him, short light brown hair atop a handsome clean-shaven face. As mentioned above he has permission to use deadly force while out in the field and he is more than willing to do so but seems to prefer to use tact - unfortunately those henchmen he invariably encounters have a predilection for violence.