A rendezvous with a valuable asset goes awry; CIA officer Sandy Grimes' investigation into the situation reveals more than she expected.

The FBI and CIA go after Edward Lee Howard after Yurchenko's disclosure; Ames bonds with Yurchenko during a trip.

After realizing a breach remains at the CIA, Sandy clashes with Jeanne Vertefeuille; Ames feels rattled by Vertefeuille's presence.

Sandy and Jeanne continue to clash; a possible asset claims to have important information about a communications breach.

A CIA counter-intelligence officer searches for a mole -- now considered to be one of the most notorious traitors in U.S. history -- during the Cold War.