Ronald Reagan hosts and narrates this documentary about the Communist threat to the free world. Alexander Kerensky, the first premier of the provisional Russian Government in 1917, formally introduces the film. This documentary traces the development of the Communist movement from birth, the Lenin years, its struggle for direction, the Stalin years (featuring a response by Leon Trotsky attacking the Stalin purges) and the ascendancy of Nikita Krushchev.

• Documentary