When did the double agent who was recruited by Arnold Deutsch defect to the Soviet Union ?
Arnold Deutsch Arnold Deutsch (1903–1942?), variously described as Austrian, Czech or Hungarian, was an academic who worked as a Soviet spy, best known for having recruited Kim Philby. Much of his life remains unknown or disputed.
Yan Chernyak Yan Chernyak (6 April 1909 – 19 February 1995) was a World War II era spy who led a network of several dozen people in Nazi Germany working for the Soviet Union's military intelligence GRU. He was nicknamed "man without a shadow" for his ability to move around undetected.