This is the penultimate episode of The Americans, and three powerful story threads, just in time, are becoming intertwined like DNA strands. Will Philip and Elizabeth be working together, or at odds, in approaching the impending summit between the U.S. and U.S.S.R.? Will their daughter, Paige, commit fully to the spy game, or be dissuaded just in time? And will their neighbor, FBI agent Stan, realize at last what he’s begun to suspect strongly: That Elizabeth and Philip, his closest of friends, are, indeed, the chameleonic sleeper Soviet spies he’s been chasing for years? Any one of these plots would be enough to bring a series to an exciting close. All three? Fasten your seat belts…