Includes Supersonic Spies and Submarines, Secrets and Spies.

Supersonic Spies: The shocking details of the race for supersonic passenger travel are finally coming to light. The Soviets started years behind the Concorde, but their remarkably similar Soviet TU-144 (dubbed the “Konkordski”) was in the air first. This true tale of Cold War espionage reveals what really happened at the 1973 Paris air show, a supersonic competition between the planes, when the Konkordski went down in a fatal, fiery explosion, which was never fully explained by either the French or Soviets.

Submarines, Secrets and Spies: If you thought the Cold War was scary then, look back now. Through candid interviews with Soviet and U.S. military personnel, shocking underwater footage and recently declassified film and documents, NOVA lifts the veil on deadly, mysterious submarine accidents and high-risk spy missions.