Acting
Powell's impossible charm against Clive's brittle intensity.
Direction
Curtiz staging Irish intrigue with shadow and cigarette smoke.

Director
Michael Curtiz
Trivia, insights & behind the scenes
Released as 'High Peril' in the UK, probably because 'The Key' sounded too suggestive for British censors already nervous about Powell's reputation.
This is peak 'Troubles tourism' cinema—Hollywood using Irish political violence as exotic backdrop for romantic triangles, with actual Irish locations nowhere in sight.