Kirkman learns who is behind the attack and needs to grapple not only with the prospect of war, but brewing domestic troubles as well. Kirkman taps Emily to monitor the domestic situation. Alex may be in for more than she bargains for when she seeks out help from Hookstraten.

When shots ring out at The White House during a Governors Summit, President Kirkman’s plans at electing a new Congress are thrown into turmoil. Agent Hannah Wells continues investigating the Capitol bombing and makes one of her most shocking discoveries yet.

When an American track-and-field coach heads to Russia, President Kirkman is thrust into a hostage exchange involving the CIA and the Russian government. Agent Hannah Wells and Deputy Director Atwood's investigation into the Capitol bombing uncovers information that puts Atwood and his family's life at risk.

On the eve of the country voting to elect a new House of Representatives, an unexpected development forces Kirkman to consider cancelling the elections entirely. News about Majid Nassar’s death leaks out, and Kirkman has to handle the fallout.

President Kirkman fears there could be a traitor in the White House when he discovers shocking information connected to the Capitol Bombing. Confiding in Emily, Kirkman puts her in charge of quietly investigating. New information surfaces about Congressman MacLeish, raising concerns regarding his vice presidential nomination.

As President Kirkman struggles to put together a new Supreme Court, FBI Agent Hannah Wells goes undercover and discovers much more than she ever could have imagined. Seth Wright has to contend with journalist Abe Leonard, who returns from the Middle East with an explosive story.

As President Kirkman considers candidates for Vice President, Kimble Hookstraten finds herself embroiled in scandal. Agent Wells and Jason Atwood return from North Dakota with a critical new lead while journalist Abe Leonard's investigation takes an unexpected turn.

As the White House gears up for President Kirkman’s first international summit, Kimble Hookstraten faces her toughest political battle yet when her speakership is challenged. Meanwhile, Alex wrestles with whether or not to bring the kids back to Washington.

President Kirkman’s first international summit is derailed when journalist Abe Leonard publishes an explosive article. Meanwhile, Hannah Wells uncovers the conspiracy’s next target.

In the nail-biting season finale, Hannah Wells must stop the conspiracy from carrying out a final attack while President Kirkman authorizes a nationwide manhunt for the mastermind behind it all.