Circle of Danger (1951)

The Ray Milland Season Unfolds Without Haste

Circle of Danger (1951) is an American in Britain post-WW2 investigative mystery Limey home nations road movie of mystery with locale-driven shooting in London, Wales and in the Highlands, making a virtue of Patricia Roc's infectious smile and Ray Milland's hatted and haunted pillar to post look as he uncovers a vaguely understandable plot that I am not sure now after two viewings — has ever been explained. 

The circle itself, the circle of danger, the rotunda of peril, is specifically not quite as convoluted as it might otherwise be in a film noir. 

The Spy in Black (1939)

The Spy in Black (1939) is a British espionage World War One submarine and double agent spy noir, and the first collaboration between the filmmakers Michael Powell and Emeric Pressburger. 

These two visionaries of the mid-century were brought together by Alexander Korda to make this World War I spy thriller novel of the same title by Joseph Storer Clouston into a film. 

Powell and Pressburger eventually made over 20 films during the course of their partnership.