In the finale, the war on terrorism and the presidential administrations of George W. Bush and Barack Obama are examined.

In the finale, the war on terrorism and the presidential administrations of George W. Bush and Barack Obama are examined.

George W. Bush and the wars in Iraq and Afghanistan; the U.S. economy; the end of the Cold War; and national security in America.

George W. Bush and the wars in Iraq and Afghanistan; the U.S. economy; the end of the Cold War; and national security in America.

Ronald Reagan succeeds Jimmy Carter; Reagan and the Soviet Union's Mikhail Gorbachev powwow; and Reagan's legacy is examined.

Ronald Reagan succeeds Jimmy Carter; Reagan and the Soviet Union's Mikhail Gorbachev powwow; and Reagan's legacy is examined.

The war in Vietnam reaches a turning point; President Nixon's involvement in Watergate comes to light.

The war in Vietnam reaches a turning point; President Nixon's involvement in Watergate comes to light.

JFK and the Bay of Pigs; on the brink of total war during Cuban Missile Crisis; early Vietnam; JFK's attempts at peace with Khrushchev; JFK assassinated. Directed and narrated by Oliver Stone.

JFK and the Bay of Pigs; on the brink of total war during Cuban Missile Crisis; early Vietnam; JFK's attempts at peace with Khrushchev; JFK assassinated. Directed and narrated by Oliver Stone.

Eisenhower and John Foster Dulles replace Truman. Stalin dies but relations with the Soviet Union turn colder. The H-bomb and the doctrine of nuclear annihilation are explored, as are the Korean War and U.S. rearmament. McCarthyism grows and so does the ruthlessness of U.S. policy towards a Third World. Eisenhower emerges as a game changer.

Eisenhower and John Foster Dulles replace Truman. Stalin dies but relations with the Soviet Union turn colder. The H-bomb and the doctrine of nuclear annihilation are explored, as are the Korean War and U.S. rearmament. McCarthyism grows and so does the ruthlessness of U.S. policy towards a Third World. Eisenhower emerges as a game changer.

The equation changes: specific month-by-month causes of the Cold War emerge and it is not entirely clear who started it. Highlights include Churchill's Iron Curtain speech, the civil war in Greece and the Red Scare that prompts the rise of Joseph McCarthy, the House Un-American Activities Committee and the FBI.

The equation changes: specific month-by-month causes of the Cold War emerge and it is not entirely clear who started it. Highlights include Churchill's Iron Curtain speech, the civil war in Greece and the Red Scare that prompts the rise of Joseph McCarthy, the House Un-American Activities Committee and the FBI.

The strategies behind the U.S. atomic bombings of Japan are explored as well as the new mythology that emerged from the war. The bombing haunted the Soviets and mistrust towards the Allies grew quickly.

The strategies behind the U.S. atomic bombings of Japan are explored as well as the new mythology that emerged from the war. The bombing haunted the Soviets and mistrust towards the Allies grew quickly.