At the time of the episode, the Cuban revolution had already started in 1953. By this time in 1956, Guerrilla Warfare was starting to occur throughout Cuba.
Ricky's Uncle Alberto is played by actor Jorge Trevino. The actor appears once again in a Cuba story-line in "Lucy Takes a Cruise to Havana." However, this time he is not Ricky's uncle. He is a judge in a police department when Lucy and Ethel get arrested.
This is Ricky's first trip back to Cuba after emigrating from there in 1940. Desi Arnaz emigrated to the United States in 1933 at age 16 after his family's very wealthy assets were wiped out in wake of the Batista revolution which overthrow the Machado government that Arnaz's father, who was mayor of his town in Santiago, was part of. Arnaz was so affected by the revolution that he never returned to Cuba in the years between 1933 and 1959 when Americans could still travel to the island. and of course after the Castro communist revolution of 1959 it became virtually impossible to travel to Cuba.