The Iron Curtain (film)

The Iron Curtain is a 1948 blackandwhite thriller film starring Dana Andrews and Gene Tierney, directed by William Wellman. The film was based on the memoirs of Igor Gouzenko. Principal photography was done on location in Ottawa, Canada by Charles G. Clarke. The film was later rereleased as Behind the Iron Curtain.

Igor Gouzenko Dana Andrews, an expert at deciphering codes, comes to the Soviet embassy in Ottawa, Canada in wartime 1943, along with a Soviet military colonel, Trigorin Frederic Tozere, and a major, Kulin Eduard Franz, to set up a base of operations.Warned of the sensitive and topsecret nature of his work, Igor is put to a test by his superiors, who have the seductive Nina Karanova June Havoc try her wiles on him. Igor proves loyal to not only the cause but to his wife, Anna Gene Tierney, who arrives in Ottawa shortly thereafter with the news that she is pregnant. ........

Source: Wikipedia