The Underwoods tackle two threats that could bring their plans to ruin. Frank grooms his replacement as Whip. Claire goes on the offensive.

Frank puts China in the cross-hairs. Claire confronts a painful trauma from her past. Lucas Goodwin presses for the truth.

Tension rises between Frank and Raymond Tusk as the situation with China deteriorates. A battle in the Senate pits Frank against the Republicans.

A terror scare at the Capitol traps Frank with a resentful Donald Blythe. Claire gives a live interview that rocks the media.

Frank back-channels with a Chinese billionaire. Lucas uses extreme measures to expose the Vice President. A shadowy figure joins Team Underwood.

Amidst an energy crisis, Frank and Tusk end their shaky alliance. Lucas must make a difficult choice. Stamper grows closer to Rachel.

Despite some friction, the Walkers deepen their friendship with the Underwoods. But it's all-out war between Frank and Tusk.

The war with Tusk intensifies. Claire influences Tricia Walker politically and domestically. Frank has a show-down with Linda Vasquez.

A rocky start for the Underwood Presidency. Frank wants to introduce an ambitious jobs program, while Claire sets her sights on the United Nations.

Claire's U.N. bid runs into trouble. Frank fights off mutiny with a bold address to the country.

The Russian president's state visit becomes a cold war of wills, and some punks heat things up.

Claire bypasses Russia at the U.N. Frank tries to outmaneuver a potential challenger and ends up face to face with a higher power.

Frank declares war on Congress to jump-start his jobs program. Claire spars with the Russian Ambassador.

Frank and Claire travel to Moscow to negotiate the return of an imprisoned U.S. citizen. Claire takes a stand that jeopardizes their plans.

The damage is done and the Underwoods must repair it. But deep wounds don't heal fast, and sometimes not at all.

A hurricane endangers more than just the entire East Coast and Frank must make a difficult choice.

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 investigation 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.

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.

As the first woman president, Claire faces increased scrutiny and threats. Sibling power couple Annette and Bill Shepherd attempt to influence policy.

Claire clashes with the Shepherds and Mark Usher, who pressure her to sign the Future Act. Doug makes an unexpected move.

The Shepherds push Claire on a Supreme Court nomination. Doug works to find a new path for himself. Claire consults with Jane on Syria.

As a crisis mounts in Syria, Russian President Viktor Petrov wants to make a deal with Claire. Questions arise about Tom Yates's whereabouts.

Claire allows her enemies to think she's incapacitated as they plot to remove her from office. Doug's investigation leads him to uncover a secret.

Claire makes staff changes. The Shepherds try to recruit Doug to their side. With Mark facing intense scrutiny, Jane offers advice.

While the Shepherd family attempts to diminish Claire's power, Doug goes off the grid but continues angling to advance his agenda.

Claire tries to tarnish Frank's legacy. Doug provokes Claire by releasing excerpts from Frank's diary. A rift develops between the Shepherds.