Watch Cold War Submarine Adventures: Cuban Missile Crisis - Secret Subs for Free: How to Stream the Movie Online at 123Movies. . Explore the events of the 1962 Cuban Missile Crisis and hear from some of the actual participants in this riveting program. After an American naval blockade intercepted Soviet submarines on a secret mission to set up a military base in Cuba, the two nations engaged in a tense standoff that led the world to the brink of nuclear war. Submariners from both sides talk about the conflict, and viewers get a look inside their subs and the U.S. war room.