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

Francis faces annihilation while the nation is in an uproar. Stamper must tie up loose ends. Claire feels the cost of ruthlessness.

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

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

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

Zoe extends her time away from The Hill while Francis tracks down Russo and engages in damage control.

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

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

Things turn ugly when Frank, Jackie, and Heather square off during their first debate. Tom joins Claire on the campaign trail.

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 midst of the Iowa caucuses, Frank and Claire must confront hard truths about each other.

Frank scrambles to keep his plan on track. Gillian is planning to sue Claire. Zoe, Janine, and Lucas investigate Rachel Posner and her relationship with Peter Russo.

Things get personal when Tusk blindsides the Underwoods with a scandal. Freddy and his BBQ joint get caught up in the mix.

Francis finds himself shut out and Claire makes a difficult sacrifice. Stamper tries to regain control.

Claire fuels an old flame. Peter wrestles with his demons. Francis crosses the point of no return.

Heather Dunbar goes for the jugular, forcing Claire to confront her worst fears. The rift between Frank and Claire widens.

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.

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.

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

A Special Prosecutor interrogates Francis. Remy Danton tries to keep his options open. Stamper wrestles with his demons.

When the newly elected President reneges on a promise, Francis and Claire decide to sever all allegiances and toss the rules out the window.

Francis and Doug plan to frame Secretary of State nominee, Michael Kern. Meanwhile, Zoe's popularity at the Washington Herald continues to grow.

The strike between Frank and Marty starts to get out of hand. Russo has decided to run for Governor of Pennsylvania.

The President sends Frank to St. Louis to persuade Raymond Tusk into becoming the new Vice President. Zoe and Janine investigate Peter Russo's death.

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