Dr. William Masters starts a secret study of human sexuality. We also see him run his medical practice, at a midwestern teaching hospital in St. Louis, as an OB/GYN by day while he works on his project by night. A new secretary, Virginia Johnson, shows promising relevance to his studies.moreless
Elizabeth and Phillip meet with the eponymous colonel, even though they suspect a trap. Meanwhile at the FBI, Stan's draws ever closed to his neighbors' true identities.
While Stan unexpectedly appears to be getting closer to a Directorate S cell, Phillip and Elizabeth worry about being caught in a sting when they are ordered to meet with a new important source.moreless
A personal situation in Moscow causes Elizabeth to embark on a mission which puts the couple in danger from both the FBI and the KGB.
Stan unknowingly gets closer to Phillip and Elizabeth when he follows a lead that will point him towards one of Gregory's crew.
Phillip and his wife find that they are racing against their FBI neighbor when tasked with preventing the assassinations of top US scientists. Meanwhile, Elizabeth is shocked by Claudia's revelationsconcerning Phillip and Irina.moreless
Trying to put their distrust aside, Elizabeth attempts to re-assert control over one of her agents and Phillip is reunited with a woman from his past.
When the KGB conducts a hunt for moles within their organisation, it results in a breakdown in trust with allies, as well as between Phillip and Elizabeth. Stan comes up with a plan to keep Nina safe, but she ends up at greater risk.moreless
The Jennings receive orders to infiltrate the encryption system that the FBI have recently adopted. Meanwhile, a KGB agent under emotional distress risks the exposure of a crucial KGB network.
An assassination attempt on President Reagan causes chaos in both the FBI and KGB. Stan puts pressure on his new spy to find out if the Soviets were responsible.
As Stan investigates the Jennings' dead comrade, Robert, Phillip and Elizabeth are shocked to discover he had a wife they were unaware of.
The creative team faces a myriad of issues to overcome during a gala with the theatre community, including Julia's continued depression, Eileen's financial trouble, and a rumor that threatens Derek's credibility in the business; Ivy contemplates leaving the business, but might end up saving the day after all; Karen befriends two Brooklyn friends and songwriters, interested in a new musical they wrote.moreless
In Texas, Reese and Carter investigate the disappearance of a 14-year-old girl from over a decade ago that may lead them to Finch and his abductor.
Mike has to handle complications and finds himself caught in the middle of the battle bwteen Harvey and Daniel, and Louis meets his match.
Michael gets back in touch with an old friend, Gene, who had recently fallen in love while traveling in India. After Gene collapses, Michael takes him in for treatment while his mother and new girlfriend squabble as they both take care of the important man in their life. A new patient comes back with a link to one of Kate's old patients.moreless
Holt Neuro runs some tests on Kate's "little sister". Michael spots a man drowning in a nearby river and brings him in. There is more to this man than meets the eye.