THE big bad bear from Moscow is back, and not just in Crimea. The Americans , about deep-cover KGB “illegals” living in Washington, DC, in the early 1980s, is now midway through its second season.

There’s much to like about the show, from top-notch performances by Keri Russell and Matthew Rhys, to their reliance on clunky, retro-spy technology, to the clever manipulation of a common fear felt, no doubt, by most children at one point or another that their parents have secret identities.

But I was in the intelligence business too, and a fundamental part of the series irks me. Even though the CIA hired me after the 9/11 attacks to fight a new menace — terrorism and Islamic extremism — the corridors at Langley still echo with the footsteps of old timers who recall the protean fight against the Soviets.

And regardless of how that conflict is portrayed in Joe Weisberg’s captivating series, it was not a sequence of increasingly lethal encounters between US and Russian intelligence services.

To be sure, much about the show is based on reality. The premise — that Russian spooks were living double lives in the suburbs — was inspired in part by a real-life network of Russian illegals (made famous by the bombshell Anna Chapman) that was busted by the FBI in 2010.

Then there is the series of background events — the assassination attempt on President Ronald Reagan, Alexander Haig’s controversial statement that “I’m in control here” — that situate the drama on an authentic historical timeline.

But The Americans’ fidelity to fact often ends there: the KGB certainly ran significant intelligence-gathering operations during the Cold War — and even carried out “dirty tricks”, like organising a racist letter-writing campaign, purportedly by American white supremacists, against African diplomats at the United Nations, and desecrating American synagogues and Jewish cemeteries to stir up discord and prove that the United States was a lousy place to live.

At the end of the day, however, the KGB never actually killed anyone in America. Washington was a violent place back in the Reagan years, but not because Russian spies were murdering folks left and right.

After all, killing people — like the security guards, former assets and random civilians that bite the dust in The Americans — in pursuit of intelligence is fraught with danger. Political murder would not only have focused America’s domestic security apparatus onto Soviet affairs like a laser, it would have also threatened bilateral relations — with potentially devastating consequences.

It should come as no surprise, then, that Cold War espionage involved more dead drops, covert meetings and brush passes than brazen assassination attempts. In fact, there’s only ever been one assassination of a Soviet defector in DC — in 1941 at the Bellevue Hotel, and it may have actually been a suicide.

So what were these Soviet illegals actually doing in the suburbs? Probably not too much, according to retired KGB Major General Oleg Kalugin, who wrote in his memoirs that the deep cover agents were the “least productive” of the KGB’s branches working in the US capital.

The most recent batch of busted Russian deep-cover agents apparently only managed to collect open-source material during their stay in America — information that could have been discovered by anyone with internet access. In fact, the US Justice Department didn’t charge any of them with espionage because they never actually sent any classified information back to Moscow.

Nor were American spies the kind of cowboys portrayed in The Americans . Much of the first season revolves around how the members of an FBI counterintelligence unit begin to take their jobs so personally that they try to kill a top KGB official at the Soviet Embassy, spurred purely by revenge. Sure, there was plenty of skullduggery in the 1980s, but killing diplomatically protected individuals in America is a bridge too far.

The reality is that it’s far more practical to swap compromised assets for American human assets caught behind enemy lines. After all, that’s what the FBI has traditionally done, monitoring real-life illegals like Anna Chapman before arresting and swapping them for compromised Russian personnel who were secretly working for the US.

With US-Russia tensions on the rise over Ukraine, Syria and elsewhere, the bogeyman from Moscow in The Americans feels ripped from today’s headlines. But by portraying an increasingly baroque series of killings as a proxy for effective intelligence gathering, the series stays firmly in the world of entertainment.

To be fair, Weisberg has always been open about his disappointment with the banality of real intelligence work. A CIA employee for a brief period in the 1990s, he decided he’d rather write about spies than be one. For those of us with experience in the shadowy world of intelligence, however, The Americans is a little too good to be true.

—By arrangement with Foreign Policy-The Washington Post