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.

Following President Ostrov's death, President Dalton and Elizabeth fear an impending power grab within the Russian government; Jay forms a plan to combat Russian propaganda.

Elizabeth attempts to lift the Cuban trade embargo. Meanwhile, Alison and Henry both while in Havana.