When he realizes that his first choice for Vice President faces an uphill fight for nomination, Jed nominates a congressman that none of the staff can get excited about; Josh is less than thrilled with his new intern.

As Chief Justice Ashland's health problems continue to mount, Joe Quincy, Ashland's former clerk, is pressed into service to persuade him to retire; as C.J. prepares Zoey for a sit-down interview about her kidnapping, Abbey reveals that her relationship with her husband is still strained; Jed refuses to be held hostage by the Republican in the budget negotiations.

Jed's decision not to be held hostage by Haffley shuts down the federal government; unable to get through to Jed and fearing the worst, Leo calls in the reinforcements, and Abbey returns to Washington to deliver a message and provide her husband with a little perspective; after being benched from the staff meetings, Josh gets put back in the game by Jed and sets the stage for victory; disregarding the advice of more seasoned colleagues, Haffley makes a major misstep and loses his advantage over the White House; Jed and Haffley meet and reach an accord on the budget.

Hail the conquering hero. Josh returns after nailing down details for a trade agreement. But the devil in the detail, including information kept from Josh. C.J. fights megamedia ownership of local TV.

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.

As they remain at Donna's bedside while she recuperates from surgery to remove a pulmonary embolism, Colin questions Josh about his personal relationship with Donna. When Bartlet and Leo clash over the appropriate response to the Gaza attack, Kate makes the case for a summit meeting, and provides Bartlet with the hook he needs to get the Israelis and Palestinians to sit down together at Camp David.

Bartlet orders a strike on the terrorist training camp as he and his staff broker a peace settlement between the Israelis and the Palestinians, but Bartlet and Leo realize that their differences over the peace settlement are irreconcilable, warranting a change in Leo's responsibilities. Having returned from Germany, Josh expresses concern about Leo's well-being, and his observations turn out to be well founded.

Leo is rushed into bypass surgery after suffering a massive heart attack; as Toby and Josh scramble chaotically to get votes after Haffley demands Democratic support for a tax cut in exchange for ratification of the peace plan, it becomes quickly apparent that Jed must overcome his reluctance to name a new chief of staff; C.J. works with the State Department on getting U.N. and NATO approval of the peace accord; Charlie drags his feet about completing some minor graduation requirements because he's reluctant to keep his promise that he'll resign as Jed's body man to seek a better position once he has his degree; Donna returns to work; C.J. gets on Josh's case about his unhealthy diet.

Santos engineers a plot to get a stalled stem-cell bill scheduled for a vote in the House. President Bartlet has an uncomfortable reunion with a rival economist with whom he split the Nobel Prize. A group of underage kids tries to convince Toby they deserve the right to vote. Kate tries to resolve a silly border dispute with Canada before there is bloodshed.