Stable Relationships for Spies

One TV drama I watched from first to last was The Americans, about two married Soviet spies living in D.C. in the 1980s.  Mr and Mrs Jennings bugged American officials, ran networks, eliminated defectors, seduced informants, raised one of their two children to be a spy, and racked up a surprisingly large body count among the enemies of socialism— including coming within an ace of assassinating Casper Weinberger. Turns out that the East German Stasi had a manual for all that.  Unlike the Jenni...