After sorting through thousands of letters all requesting something of president, the White House staff are assigned three, with Emily, Seth, Aaron, Llyor and Kendra joining forces to get answers and possibly save a life. Meanwhile, Hannah and Damian continue to chase down leads to exonerate the first lady, but in the end, Hannah learns the truth may be closer than she thinks.
On the night of the State of the Union, an explosion claims the lives of the President and all members of the Cabinet except for Secretary of Housing and Urban Development Tom Kirkman, who had been named the Designated Survivor. Kirkman is immediately sworn in as President, unaware that the attack is only the beginning of what is to come.
Designated Survivor - Three-Letter Day Synopsis and Schedule