While Elizabeth looks for a diplomatic way to handle a cult in Bolivia, the organization takes a congressman hostage; Stevie introduces her boyfriend to Elizabeth and Henry.

As Elizabeth attempts to hold herself together, she tries to prevent an ecological disaster and prepares for an appearance on "Face the Nation"; Henry and Elizabeth disagree on the level of protection Jason should have at school.

Elizabeth makes a secret trip to Iran in hope of preventing a coup that could affect President Dalton's administration; Elizabeth's staff is brought up to speed on the investigation into Marsh's death.

When the Turkish government releases a potentially damaging video, Elizabeth must mend political relations; Jason punches a school bully.

Elizabeth's staff fails to find existing corruption in her microloan program, leaving her humiliated at a public budget hearing; an investigation into Marsh's death progresses.

Elizabeth wants a Bahraini diplomat prosecuted when he is caught holding a maid hostage; Henry's father visits.

Elizabeth's wedding anniversary celebration is cut short when political tension forces her to re-examine an extradition deal she made; Elizabeth's son is injured while Blake is watching him.

As Elizabeth, Henry and Isabelle search for a secret bank account belonging to former Secretary of State Vincent Marsh, they learn that one of Elizabeth's staff members has access to it.

A deranged gunman puts the State Department on lockdown; a translator threatens to reveal damaging information about Elizabeth's time in the CIA; Matt reveals information to Daisy's fiance.

Elizabeth investigates a plane crash that killed Secretary of State Vincent Marsh; Nadine agrees to a date with a NASA scientist.

After being reactivated to the NSA, Henry lies about it to Elizabeth; the office is impacted by Daisy and Matt's antagonism.

Elizabeth brings Alison with her on a state department trip to India; when an earthquake causes an explosion at an American-owned factory, the chaos separates Elizabeth from her daughter.

Elizabeth asks the president for help with a dire situation in Western Africa but ends up being faced with unexpected consequences.

Elizabeth must negotiate with Iran regarding their escalating nuclear program; Jason interviews his father for a school report.

A Chinese student seeking political asylum threatens a potential peace treaty between Japan and China; tension grows between Stevie and Alison.

A hostile reporter threatens to publish confidential documents leaked from the State Department; Henry becomes involved in an international negotiation.

While Elizabeth deals with a crisis in Yemen, her eldest daughter makes headlines for protesting a new university policy.

Secretary of State Elizabeth McCord faces an abundance of political challenges, most importantly an international hostage situation; the McCord children struggle to adjust to their new schools.

When Marine Sgt. Nicholas Brody returns home following eight years in captivity, CIA agent Carrie Mathison thinks he has turned and is connected to a terror plot to be carried out on American soil, so she engages him in a dangerous game of cat and mouse that puts America's national security at risk. Later on, Carrie gets a promotion and returns to the front lines overseas. She is assigned to one of the CIA's most volatile and dangerous stations in the Middle East, where she is in the heart of battle in the war on terror. Years later, after being disillusioned and placing herself in a self-imposed exile in Berlin, Carrie becomes estranged from the CIA, eventually returning stateside where she works for a foundation providing aid to Muslims living in America.

Eccentric genius Walter O'Brien leads a group of brilliant misfits who constitute Homeland Security's new think tank, helping defend against the high-tech threats of the computer age. The team -- dubbed Scorpion -- includes behaviorist Toby Curtis, mechanical prodigy Happy Quinn, and statistics guru Sylvester Dodd. While comfortable with one another, the team members struggle with understanding life outside their circle, so when they need help translating societal cues, they rely on the skills of Paige Dineen, a woman with a gifted young son.

At 12 years old, Kara Zor-El escapes doom on planet Krypton to find protection on Earth with the Danver family, where she grows up in the shadow of her foster sister, Alex, and learns to hide the extraordinary powers she shares with her cousin, Superman. Now an adult living in National City and working for media mogul Cat Grant, Kara finds her days of keeping her abilities a secret are over when super-secret agency head Hank Henshaw enlists her to help protect the city's citizens from threats. Finally coming into her own, Kara must juggle her new responsibilities with her very human relationships.

As mayor, Tom Kane is the most powerful man in Chicago, where the constituents have a history of looking the other way as long as the job gets done. And Kane has gotten things done over several terms in office; he knows the backroom politics game in the Windy City and he plays it well. Yet despite his success, Kane leads an otherwise empty existence. He has no one to turn to when he's confronted with the fact that he has a degenerative brain disorder. He's estranged from his wife, Meredith, and daughter, Emma. Kitty O'Neil, Kane's chief of staff, has her suspicions but plays the part of loyal employee, as does adviser Ezra Stone, who doesn't ask any questions. That's the way Kane likes it, of course, but he won't be able to keep his secret forever.