THE FRENCH DROP—Investigating a suspicious death, Foyle gets caught up in the rivalry between the established spy agency MI5 and the newly created SOE. 　　ENEMY FIRE—Sabotage, murder, and adultery at a pioneering RAF hospital brings Foyle face to face with the devastating physical and emotional consequences of war. 　　THEY FOUGHT IN THE FIELDS—A murdered farmer and the crash landing ...

《战地神探》是2002年至2015年在英国ITV播出的以二战和冷战初期为背景的历史侦探剧，共八季28集。第四季的剧情背景设置在1942年至1943年间，共由Invasion、 Bad Blood、Bleak Midwinter、Casualties of War四集组成。