Protocol 66 is the first Malin note dated after the Cuban Missile Crisis, on 11 November. The tone of the protocol indicates that Castro is not pleased with Khrushchev's handling of the crisis, and there is a growing sense of distance between Cuba and the Soviet Union.

A report from the Chinese Embassy in Cuba saying that Castro has send a letter to the United Nations Secretary-General rejecting any country or international organization who would conduct inspections on Cuban territory. The letter also reveals that US airplanes being sent into Cuban airspace could be shot down.

The telegram bears on the circumstances surrounding Fidel Castro's controversial 27 October letter to Khrushchev. Alekseev describes Castro's demeanor as being irritated and paranoid at the time of writing the letter. He provides background on Castro's actions and attitudes at the peak of the crisis, and especially his nocturnal visit to the Soviet embassy and preparation of his letter to Khrushchev on the night of 26-27 October. He advises Moscow on how to handle the Cuban leader, and offers analysis into the emotions and overall mood of Castro and his associates at that moment in the crisis.

A telegram dispatched from the Soviet embassy in Havana early on the morning of Saturday, 27 October 1962. Fidel Castro was at the embassy and composing an important "personal" message for Nikita Khrushchev. The alarmed Cuban leader anticipated US invasion in the next "24-72 hours."

A report on Alekseev's 23 October 1962 conversation with Fidel Castro, together with two members of the Cuban leadership, the day after the public crisis began. Presented with official Soviet statements on the crisis, Castro reviews the situation and confidently vows defiance to the US "aggression," which he claimed was doomed to failure.

Report on the American effort to spread false rumors about the arrival of Soviet military equipments and personnel in Cuba. To counter this subversive attempt, the Cuban security organs has established full control of foreign correspondence and captured maps and intelligence reports.

Telegraph Agency of the Soviet Union (TASS) news wire dispatch. The United Press International Agency reported on the sides' softened stances in negotiation and U Thant's role in the inspection issue.

Fidel Castro explained to Khrushchev his decision to shoot down American planes operating in Cuban air space and reaffirmed his opposition to any inspection of Cuban territory.

In his message to Khrushchev, Fidel Castro evaluated the two possible scenarios of American aggression against Cuba. Castro seems to suggest a retaliatory nuclear strike against the US in the case of an attack on Cuba.

Kuznetsov relays the results of a conversation between Mikoyan and U Thant. The bulk of the conversation between the two concerns U Thant’s recent visit to Cuba and his conversation with Castro. Mikoyan stresses lifting the quarantine around Cuba.