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.

Elizabeth, Henry, and Isabelle work together to find former Secretary of State Vincent Marsh’s secret bank account, but soon uncover that one of Elizabeth’s staff members already has access to it.

As the U.N. Security Council considers reinstating sanctions against Iran for its suspected nuclear activities, Elizabeth tries to stop Israel from taking matters into its own hands when it threatens military action against the Iranians.

When a possible Israel-Iran war threatens the House’s imminent vote on the U.S. presidential election, Elizabeth attempts to bring the two reluctant countries to the negotiation table in an effort to broker a peace between them. Also, Russell’s life hangs in the balance after a heart attack.