Saul consults an expert on Russia and a data scientist. Sen. Paley subpoenas Simone, whose testimony has Carrie re-examining her entire investigation.

Saul hunts for Simone's link to Russia. Carrie flees with Franny after a blowout with her sister and later has an eye-opening chat with Dante's ex.

Wellington puts pressure on the Russian ambassador. Maggie gives Carrie an ultimatum. Saul and Carrie take extreme steps to get Dante to talk.

Yevgeny learns what happened to Dante. Saul takes a risky chance to uncover Yevgeny's network. Carrie finds out her sister is consulting a lawyer.

Russia expert Sandy tells Saul she suspects Simone is still alive. Carrie faces Maggie in court. Keane's future rests in the vice president's hands.