Elizabeth must decide whether to use autonomous unmanned weapons or send U.S. soldiers to bring the mastermind of the UN gas attack to justice. Also, Blake is questioned by Senator Hanson about potential campaign finance violations related to his love life, and Henry and Elizabeth search for the perfect dog.

After President Dalton hears about a sonic attack at the U.S. Embassy in Bulgaria, he thinks Russia is to blame and uncharacteristically threatens them with military force, leaving his cabinet concerned about his mental status.

Elizabeth flies to Fashion Week in Milan to face off against the Chinese Foreign Minister over an anti-sweatshop treaty in the aftermath of a tragedy. Also, Daisy struggles with feelings of fear and pessimism over her baby’s future, under the threat of rising nationalism in the wake of the attack on the White House.

Elizabeth must salvage a deal with a military contractor by supplying fighter jets to Taiwan, but she risks triggering a war with China in the process. Also, Daisy gets frustrated with Matt for failing to help take care of her dog like he promised.

As Elizabeth prepares to leave the state department and announce her run for president, anti-globalist terrorists attack the United Nations delegation in Geneva who are there to sign the climate migration treaty.

Henry teams up with a Marine veteran to fight for legislation that helps Veterans Affairs provide better mental health care, but he encounters surprising resistance from Vice President Carlos Morejon. Also, Senator Hanson questions Daisy about an arrest in her past.

When a fabricated video makes it look like Elizabeth and Henry are making fun of a foreign dignitary, they struggle to convince him not to pull out of an important international agreement. Also, Stevie says goodbye to an important person in her life.

When the assistant vice minister of Timor-Leste suddenly dies during a meeting with Elizabeth on the first day of the U.N General Assembly, she becomes suspicious after the president of Timor-Leste ships the body back without a proper investigation. Also, a “fake news” story surfaces claiming Elizabeth is responsible for the minister’s death, and Dmitri returns to work with Henry.

Elizabeth secretly travels to Iran in an attempt to prevent a coup that could impact President Dalton’s administration. Also, she brings her staff up to speed on the investigation into Marsh’s death.

When the Mongolian government sends Elizabeth a horse as a gift, she thinks accepting it could upset other Asian countries, but she stirs up more controversy when she considers returning it to Mongolia. Also, Gov. Sam Evans threatens to sue Ohio for putting President Dalton on the election ballot, and Stevie has an interesting first day as Russell’s new intern.

Elizabeth, Henry, and Isabelle investigate a plane crash that killed former Secretary of State Vincent Marsh. Nadine reenters the dating scene after she agrees to go on a date with a NASA scientist.

When a storm destroys a naval base in Bahrain, Elizabeth urges President Dalton to reexamine his approach to climate change and his overall foreign policy, something that could jeopardize his re-election campaign. Also, the McCords worry that their family is being stalked when they discover Jason’s laptop may have been hacked.

While Elizabeth is in Libya to help negotiate an end to their civil war, a tragic accident with her chauffeured car embroils her in an urgent situation to secure medical care for a gravely wounded local girl.

With a government shutdown looming, Elizabeth must think outside the box to help fund an electrical grid in a Syrian refugee camp, before riots break out in the country due to the lack of electricity and water. Also, Henry searches for Dmitri when he goes missing.

Secretary of State McCord and her staff work with the Mexican government to extradite a Mexican cartel leader to a U.S. prison in an effort to diminish the opioid crisis. But after he escapes during transport and a journalist who secured a gloating interview with him while on the lam is murdered, Elizabeth’s urgency to find the leader escalates.

Secretary of State McCord reluctantly agrees to host a holiday party in the hopes of persuading senators in attendance to pass a treaty that requires countries to destroy landmines. Also, Henry tries to find evidence that the Senate Majority Leader exchanged information with the Russians.

Secretary of State McCord struggles with the realization that she may need to advise the Afghan government that a compromise with the Taliban may be better than a war with them. Also, Henry uses Dmitri as bait to convince a Russian spy to help the U.S., and Daisy returns from maternity leave and decides to finally tell Joe’s mother about the baby.

When Vice President Hurst feels threatened that Secretary of State McCord is vying to be the next president, she attempts to set Elizabeth up for failure by promising that Americans will continue to be able to adopt Russian orphans, despite the potential ban by Russia’s president. Also, Elizabeth and Henry find out Stevie is dating Dmitri after he is followed by a Russian assassin.

Elizabeth and the team are caught in an uncertain situation when they are about to award a foreign leader with the Medal of Freedom but learn he may have known that a minority group in his country is being persecuted. Also, President Dalton doubts his ability to return to office after being cleared by his doctor, and a past family grievance is brought to light when Henry’s sister pays a visit.

Senator Morejon puts phase two of Elizabeth’s U.S./Iran arms deal in jeopardy when he asserts that Iran funneled money from phase one of the deal to fund a recent bombing that killed an American citizen. Also, Henry mulls over the option of becoming the chairman of the new military ethics department at the National War College.

Elizabeth and cabinet members brace for the fallout at home and abroad as President Dalton prepares for a retaliatory nuclear attack on a country that has reportedly just launched missiles bound for the U.S.

When Elizabeth discovers that the White House attackers had support from overseas, she tries to hunt down those responsible without starting a war. Also, Henry comes face to face with one of the attackers.

When the remains of U.S. soldiers who served in World War II are uncovered in Southeast Asia, Elizabeth’s hopes of bringing them home quickly fade when a stubborn leader stands in her way. Also, Henry and Stevie find themselves publicly targeted by a restaurant owner who is angry about Elizabeth’s policies, and Alison volunteers for a local congressional campaign.

Henry finds himself at the center of an international incident, when he comes to the aid of an ex-girlfriend at a religious freedom conference in Thailand, after she is imprisoned for condemning the monarchy. Also, Elizabeth helps Jason navigate the pressure of preparing for college.

Vice President Teresa Hurst asks Elizabeth for help when a surrogate carrying her future grandchild is arrested in Laos for human trafficking. Also, Henry tries to protect Stevie from danger when he suspects that she’s being followed by a Russian operative, and Blake deals with the demanding and costly instructions of a delegation of Japanese gardeners.