Paul Newman and Julie Andrews star in this classic tale of international espionage set behind the Iron Curtain. Newman plays world-famous scientist Michael Armstrong, who goes to an international congress of physics in Copenhagen with his fiancée/assistant Sarah Sherman (Andrews). While there, she mistakenly picks up a message meant for him and discovers that he is defecting to East Germany. Or is he? As Armstrong goes undercover to glean top-secret information, the couple are swept up in a heart-pounding chase by enemy agents in this action-packed Cold War thriller.