Julian Acosta

A star witness in a high-profile narcotics case is murdered along with his girlfriend. Despite detective insistence that the woman was an incidental victim of the crime, Patrick begins to wonder whether she was in fact the killer's primary target.

After communications with the president's plane are lost, Elizabeth is sworn in as the acting president. Henry is asked to recruit one of his students for the NSA.

When dealing with the Russian government, the president's administration comes across hostility. Dmitri is interrogated about being a spy.

When a government employee is kidnapped in Afghanistan, Elizabeth takes advice from former Secretary of State Madeleine Albright, clashing with the president's recommendation.

Elizabeth, Russell and Mike B. must oust Craig Sterling from his role as national security adviser without creating a scandal; the person who hacked Air Force One is identified.

Henry shares information that causes Elizabeth to reconsider her theory that the Russians are responsible for the attack on Air Force One.