A mole hunt within the KGB causes suspicion amongst allies and shatters trust within the Jennings' marriage. Meanwhile, Stan's plan to keep his mole safe puts her at even greater risk of discovery.

Alison Wright, Annet Mahendru, Derek Luke, Lev Gorn, Margo Martindale, Michael Oberholtzer, Peter von Berg, Richard Thomas, Robert Bogue, Susan Misner, Vitaly Benko