The Enemy Within Show Summary, Upcoming Episodes and TV Guide

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 on Sierra Maestra, the CIA's secret detention center imprisoning his operatives. Shepherd's ever-shifting allegiance raises the question if she is there to stop Tal or join him?

When a highly sophisticated Tal operative (guest star Michael James Shaw) evades FBI custody and flees to the Swiss embassy, Keaton and the Cointel team must go undercover. What begins as a smooth counterintelligence operation quickly devolves into a tense hostage situation.

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 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 to pass the technology to the intended recipient, a 19-year-old computer genius (guest star Stephen Friedrich). Keaton must choose between catching Tal or saving the life of an innocent teenager.

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.

Following the discovery that a U.S. ambassador is selling classified intelligence to a Colombian cartel, Shepherd devises a plan to catch him that will push Keaton's moral code to the brink. Keaton brings a new member on to the team.

Erica Shepherd is a brilliant former CIA operative, now known as the most notorious traitor in American history serving life in a Supermax prison. Against every fiber of his being but with nowhere else to turn, FBI Agent Will Keaton enlists Shepherd to help track down a fiercely dangerous and elusive criminal she knows all too well. For Keaton, it's not easy to trust the woman who cost him so much. While Shepherd and Keaton have different motivations for bringing the enemy to justice, they both know that to catch a spy... they must think like one.