Carrie and Saul identify Walker's contact in Washington but their target has diplomatic immunity; Brody is approached to run for a disgraced congressman's seat in the House of Representatives.

Dana is shocked by her visit to the hospital. Faber's Tom Walker questions get him tangled up with the CIA. Brody agrees to help stop an attack on America, but his loyalty is questioned when Gettysburg once again becomes a battleground.

Saul catches up with an old friend and discovers evidence of covert activities by Estes. Brody and Vice President Walden find themselves at odds over the future of their political relationship, while Dana and Finn come to terms with their own differences.