An American scientist working as a double agent pretends to defect to East Germany, hoping to learn vital information about activities behind the Iron Curtain. However, his dangerous mission is jeopardised when his unsuspecting fiancee decides to follow him - and unwittingly draws attention to them both. Cold War thriller, directed by Alfred Hitchcock, starring Paul Newman, Julie Andrews, Lila Kedrova and David Opatoshu.

During the Cold War, an American scientist appears to defect to East Germany as part of a cloak and dagger mission to find the formula for a resin solution—but the plan goes awry when his fiancee, unaware of his motivation, follows him across the border.