Today's article was written together with ExecutedToday.com. Below are some paragraphs from the full article published here:1939: Georgy Nikolayevich Kosenko (aka Kislov), NKVD spy
Execution of Georgy Kosenko (also known as Kislov), a Soviet spy in China and France:
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One thing about the first years of Soviet history that always puzzled me is how the Bolsheviks managed to create a wide and reliable network of foreign intelligence and counter-intelligence so fast. Below is a history of life and death of a typical spy from the early Soviet years.…
In July 1938, Kosenko’s Spanish opposite number and sometime collaborator Alexander Orlov fled to the USA, guaranteeing his own safety (and that of the mother he left in the USSR) by threatening to reveal Soviet intelligence secrets if pursued. Orlov sent a letter to Trotsky warning him that a Soviet agent named Mark had penetrated his son’s circle, and that the NKVD was preparing the assassination of Trotsky at the hands of either Mark or an unknown Spaniard. (Trotsky thought the tip was a provocation, and fatefully ignored it.)
Stalin went mad. He ordered the new head of NKVD Lavrentiy Beria to punish all spies involved in the debacle. Kosenko was one of them. In November 1938 Kosenko received an order to return to Moscow and on 27 December he was put to the same jail where General Miller was still imprisoned. Kosenko was accused of participation in a counter-revolutionary organization and on 20 February he was sentenced to death. That same night of 20-21 February 1939 he was shot and his body was buried in an tomb without any name or date.
So, this story does not answer the question I asked in the beginning, but rather dismisses it by proving that the Soviet intelligence network was wide but far from reliable and that eventually these spies either eagerly got rid of each other or simply fled as far as they could.