Once Shepherd convinces Keaton that Anna Cruz is a mole inside the FBI working for Tal, Keaton decides to keep his enemies close. With a fox in their henhouse, Keaton and the team spy on one of their own, hoping Cruz will lead them to Tal.
When the FBI intercepts stolen NSA software intended for Tal, Keaton uses the technology as an opportunity to go on the offensive and sends Shepherd undercover. Keaton must choose between catching Tal or saving the life of an innocent teenager.
After a major Tal operative escapes CIA custody, Shepherd returns to Langley to help track the fugitive down. Shepherd and Keaton discover the CIA is withholding vital information on Tal, so they spy on the CIA to find out what the agency knows.
When a group of contractors working for the CIA are murdered, Keaton and the team discover the CIA is keeping secrets from the FBI regarding Tal. Shepherd's ex-husband finds out that Hannah has been lying and visiting Shepherd.
When a highly sophisticated Tal operative evades FBI custody and flees to the Swiss embassy, the Cointel team must go under cover. What begins as a smooth counterintelligence operation quickly devolves into a tense hostage situation.
Keaton and his team are able to intervene and stop the assassination of a high-profile congresswoman. Shepherd interrogates the congresswoman, who had previously used Shepherd's treason conviction as a launching pad for her political career.
Tal's war on the CIA expands to two fronts. Keaton and the CoIntel team must locate the domestic target before Chigorin launches an all-out assault on the unsuspecting innocents. Shepherd convinces Keaton to let her go to Cuba to thwart Tal's attack.