The staff wrangles with the State Department over language in the inaugural address; a genocidal war breaks out in Kundu, and Bartlet weighs his options as Will pushes for American military involvement based on Bartlet's statements in the past; the Chief Justice's increased propensity for writing opinions in verse causes concern about his competence; Bartlet keeps Charlie busy on the hunt for the perfect Bible for the inauguration; Donna becomes upset when Jack is transferred out of the White House and reassigned to Italy after getting caught in a squeeze play between the Oval Office and the Pentagon.

The fallout on the Hill from Carrick's switch to the Republican party exiles Josh deep into a White House doghouse, so C.J. gives Donna some tips on how she can support him; Jed gets a harsh reality check from C.J. when he lingers too long in a small Oklahoma town devastated by a deadly tornado; in Jed's absence, Leo juggles an impending war between Albania and Greece, a visit from the German chancellor, a tussle over tax cuts, and an over-reaching Secretary of Defense; Josh and Toby are less than thrilled when Leo brings Angela on board to assume some of Josh's responsibilities.

President Bartlet attends the funeral of a former president with other former presidents Glenallen Walken and D. Wire Newman, while monitoring a possible situation in Saudi Arabia. Josh Lyman mediates an argument between a representative from Connecticut and one from North Carolina who wants her state's copy of the Bill of Rights returned. CJ is concerned about a scientist's invention which could interfere with privacy.

An unlikely party comes to the aid of the administration as it seeks to discover the party responsible for nuclear testing in the Indian Ocean; Will is unhappy, but his boss doesn't seem to mind, when a request to beef up the Vice President's issue profile results in Toby's handing him boring, low-level minutae; Josh dismisses a NASA proposal for a manned Mars mission until an agency staffer shows him the error of his ways; a conservative talk show host makes a pathetic attempt to bait C.J. into appearing on his show.

Donna Moss, Percy Fitzwallace, Andrea Wyatt and a couple of congressmen are in the Middle East on a fact finding mission when their cars are blown up. President Bartlet considers possible military targets to bomb in retaliation. In flashbacks, we see Donna becoming attracted to British photojournalist Colin Ayres.

Jed weighs his options for responding to the bombing as Israeli and Palestinian forces face off against each other; Josh has an interesting reaction when Colin arrives at the hospital to visit Donna; Kate and Leo clash over the advice she's giving Jed; Josh assumes a diplomatic role when the Palestinians approach him to initiate settlement discussions; Toby and Charlie prepare a reluctant Jed for throwing out the first ball at Camden Yards; Donna's life is threatened when she develops a pulmonary embolism; Jed reflects on the days prior to his first inauguration.

Margaret and Charlie prove to be invaluable allies as C.J. has a rough first day in her new position, made even more difficult by a Russian bearing radioactive gifts and a Defense Secretary's attempts to undermine her; Toby's less than stellar performance in the briefing room makes the search for a new press secretary a top priority, and Josh volunteers Donna to assist him in interviewing potential candidates; faced with a number of vulnerable seats in the upcoming election, Josh attempts to dissuade Matthew Santos from dropping out of another race for the House.

On the day after Bartlet gives his last State of the Union address, Leo returns to the West Wing but has difficulty getting the attention of the rest of the staff for a meeting about what to do during the remaining 365 days of Barlet's term. Kate and C.J. have to deal with emergencies in Bolivia and North Korea. Charlie tries to figure out how to get Congress to support funding for the Earned Income Tax Credit. Toby solicits Annabeth's advice regarding proper behavior for Abbey at a NASCAR event. Will asks why they originally chose Russell to be Vice President. And Bartlet seems to have recovered most of his strength after his recent bout with MS.

Valentine's Day starts badly when the Iranian air force shoots down a British airliner, killing 100 passengers. The U.K. Prime Minister threatens to retaliate by bombing nuclear reactor sites, which could doom future support for political reformers in Iran. But C.J. has made an agreement with Abbey to allow the President to get more rest, and she is reluctant to awaken him at 5 A.M. to deal with the crisis. Meanwhile, Toby and a visiting law professor answer questions from a foreign delegation that is trying to write a new constitution for the former Soviet Republic of Belarus, and harried staffers pass the buck of Leo's traditional meeting with the new Miss World.

Faced with a Democratic party in disarray in the face of the strongest Republican challenger they have ever had, Bartlet asks Leo to take charge of the potentially chaotic Democratic National Convention, while Santos considers a party-unifying vice-presidential offer from front-runner Russell. Meanwhile, the International Space Station is leaking oxygen and a rescue of the three astronauts will be difficult, and Bartlet catches Charlie leaving Zoey's bedroom after a nighttime visit.

At the Democratic National Convention, Russell, Santos and Baker jockey for the 2162 votes that will give one of them the nomination for President, and the opportunity to lose to the apparently unstoppable Vinick in November. Meanwhile, the President must make a decision before it's too late on whether to deploy a secret rescue mission to the space station, and the FBI is asked to determine who leaked the existence of the military shuttle to the press.

Margaret is interrogated at a hearing held by the Senate Select Committee on Intelligence; Santos deflects religious questions onto Vinick; Someone gives C.J. intelligence information; a Palestinian leader is assassinated and Bartlet wants to attend the funeral despite security concerns. Also, we learn Margaret's last name.

The White House is trying to cope with the revelation of the identity of the leaker and Babish's questioning of Toby convinces him that he must get his lawyer. Lou persuades Josh to get Santos to clean house with his campaign staff. Kate finally reaches Charles Frost and confronts him about what he told to C.J. and a few other things about his personality in general. The Bartlets hear Ellie's heapful of "good" and "bad" news.

Santos is working on campaign strategy, Ellie's getting married, Abbey is welcoming guests, Bartlet's making jokes, China and Kazahkstan are about to go to war, Carol makes an appearance, and Josh may get fired.

After the near-nuclear disaster at the power plant the polls show surprising, or maybe not so surprising, results for both candidates. The Vinick camp gears up for backlash while the Santos camp hopes for cause to celebrate. Meanwhile Bartlet is still trying to keep the situation in Central Asia under control. Relationships in the Santos campaign, the Vinick campaign, and the West Wing all undergo changes and Vinick and Bartlet attempt to deal with different versions of the cold.

Former cast member Rob Lowe returns as a senior political official in this episode, which finds Bartlet and his staff making the transition as easy as possible for the president-elect, who discovers some unpleasant realities about his new job. Meanwhile, a stressed-out Josh realizes that he may need to take some time off after he reaches his breaking point.