Torn Curtain

Professor Michael Armstrong, played by Paul Newman, makes a trip to Stockholm to attend a physics conference accompanied by his fiancee and assistant Sarah Sherman, whose role we find a great Julie Andrews.

Once they reach their destination Michael tries to send his wife home, but this is followed when crossing the Iron Curtain, thinking that her husband has decided to change sides as a result of the cancellation of his science project.

Written by Brian Moore and directed by the king of suspense, Alfred Hitchcock.