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.

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.

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.

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

Claire advises Donald Blythe on dealing with Petrov. Further investigations of Lucas Goodwin dredges up his accusations against Frank.

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

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.

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

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.

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

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

Frank asks Will to help deal with extremists threatening to murder hostages. Hammerschmidt digs deeper into the allegations against Frank.

As the hostage situation continues, Claire secretly negotiates with Yusuf al Ahmadi. Frank confronts Hammerschmidt.

As Congress debates investigating Frank, he and Claire attempt to stoke fear of terrorism. Tom Yates continues his stay in the White House.

Frank and his team work to leverage support in key states by any means necessary. Claire learns some upsetting news about one of Frank's friends.

The day before the election, Conway holds a 24-hour Skype session with voters, while Frank and Claire stump in key states and try to discredit him.

With a tight race and low voter turnout on Election Day, things look grim for Frank. But he's still got one more trick up his sleeve.

Nine weeks after Election Day, the Underwoods work to consolidate their power. Leann tries to track down a missing Aidan Macallan.

In the midst of uncertainty, suspected Russian forces take over an American station in Antarctica. Meanwhile, a damaging news leak could hurt Frank.

When a crisis forces White House personnel to take shelter in a bunker, Commerce Department official Jane Davis negotiates through back channels.

While Frank attends an elite men's weekend gathering to firm up support, Claire deals with a stranded Russian ship and threats from Petrov.

Petrov tries to influence affairs in the U.S. Jane discusses her agenda with Claire. With her job at stake, Leann reaches out to a reporter for help.

The Underwoods and their team angle to undermine the revived committee investigating Frank. Hammerschmidt's investigation heats up.

As the team tries to control fallout from damaging testimony and leaks, everyone is under suspicion and tensions flare between Frank and Claire.

Frank attempts to stop Cathy from testifying. With Hammerschmidt sniffing out the truth, the Underwoods throw someone close to them under the bus.

In the wake of a surprising announcement, everything at the White House is shaken up. A decision must be made about whether to go to war.