Marika Rökk, who was banned from acting for two years for her apparent closeness to the Nazi regime, had in fact been working from the 1940s onwards for a reconnaissance network passing Third Reich secrets to Moscow. Guardian.
When in Tass, I worked together with the famous Soviet war-time spy, Yan Chernyak. Born to a Jewish family in the town of Czernowitz in the Austro-Hungarian Empire in 1909, Chernyak created in Germany during WWII a network of spies, which included Marika Rökk, Olga Chekhova and other well-known persons of the Third Reich.
His war-time nickname was “man without a shadow”.
I have a detailed story of what I remember about Chernyak in the Russian-language version of my blog.