They've always been a great team. But now Frank and Claire become even greater adversaries as their marriage stumbles and their ambitions are at odds.

1. Chapter 40 49m Claire's absence causes problems for Frank on the campaign trail amid rumors of a marital rift. Claire tries to strike out on her own.

2. Chapter 41 42m As Claire begins exploring a campaign of her own, she and Frank engage in backdoor political maneuvering. But this time they're not on the same side.

3. Chapter 42 55m Claire joins Frank as he stumps in South Carolina, but he doesn't trust her. A disastrous scandal blindsides Frank's campaign on primary day.

4. Chapter 43 43m Claire threatens Frank. Frank makes a politically bold move that may provoke Russia. An event at a campaign stop changes everything.

5. Chapter 44 48m Claire advises Donald Blythe on dealing with Petrov. Further investigation of Lucas Goodwin dredges up his accusations against Frank.

6. Chapter 45 48m Claire clashes with the Secretary of State over her involvement in negotiations with Russia. Dunbar must choose between her campaign and her ethics.

7. Chapter 46 52m Frank and Claire adjust to their new reality. The search for Frank's running mate begins. Frank starts a campaign to weaken Conway's strong support.

8. Chapter 47 47m Formidable as ever, both Underwoods have their eyes on the big picture as they manipulate a potential running mate and push the gun bill.

9. Chapter 48 46m At the convention, Frank and his team publicly push for Catherine Durant to be chosen as his running mate, but privately pursue a different agenda.

10. Chapter 49 57m As Frank deals with a new threat to his candidacy, Claire has doubts about their plan. Claire faces a difficult decision concerning her mother.

11. Chapter 50 52m Frank ups the ante on the war on terror to counter Conway's public show of strength. Tom joins Claire on the campaign trail.

12. Chapter 51 47m Frank asks Will to help deal with extremists threatening to murder hostages. Hammerschmidt digs deeper into the allegations against Frank.