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.