|Cary Grant||T.R. Devlin|
|Ingrid Bergman||Alicia Huberman|
|Claude Rains||Alex Sebastian|
|Louis Calhern||Captain Paul Prescott|
|Leopoldine Konstantin||Madame Anna Sebastian|
|Reinhold Schünzel||Dr. Anderson|
|Moroni Olsen||Walter Beardsley|
In order to help bring Nazis to justice, U.S. government agent T.R. Devlin recruits Alicia Huberman, the American daughter of a convicted German war criminal, as a spy. As they begin to fall for one another, Alicia is instructed to win the affections of Alexander Sebastian, a Nazi hiding out in Brazil. When Sebastian becomes serious about his relationship with Alicia, the stakes get higher, and Devlin must watch her slip further undercover.