To Catch a King 1984
Directed by Clive Donner | Starring: Robert Wagner, Teri Garr, Horst Janson, John Standing
Robert Wagner plays an American who owns a Lisbon nightclub and Teri Garr is a slightly dippy chanteuse who has stumbled across a Nazi plot to kidnap the Duke and Duchess of Windsor, living at the time (1942) in Portugal.