* FanPreferredCouple: Despite a 27-year age difference between the characters, 73 percent of Foyle’s War related fanfics found on FanFictionDotNet as of the beginning of 2012 romantically pair Christopher Foyle and his driver Samantha Stewart.
* GeniusBonus: Or at least a bonus for the musically literate. A piano piece that is heard several times in "Elise", associated with the episode's title character, is not identified beyond a remark that Music/LudwigVanBeethoven is perhaps not a tactful choice given the war; it's Beethoven's Bagatelle No. 25 in A minor, "For Elise".
* RetroactiveRecognition: The show contains a near-hilarious amount of young British actors who went on to make Hollywood's A-list, particularly Creator/JamesMcAvoy (who is best known for portraying the younger [[Characters/XMenFilmSeriesProfessorCharlesXavier Professor Charles Xavier]] in the ''Film/XMenFilmSeries''), Rosamund Pike and Emily Blunt. Also featured are the fresh young faces of Creator/DavidTennant, Creator/SophiaMyles and Creator/TobiasMenzies.
** When Foyle begins deconstructing Reginald Walker in "War Games," the gold box from Germany is the linchpin. [[spoiler:As soon as his narration voices over a flashback to his visit to a rabbi, you know that the box belonged to victims of the Holocaust--a Jewish family who used it to hold their prayer book before they were shot by the Nazis, and it was given as a sickening gift to a family who, according to Foyle's barrister friend, were more virulently anti-Semetic than even most Nazis.]]
** All of Dr. Novak's plot in "Broken Souls."
* SomeAnvilsNeedToBeDropped: In "A Lesson in Murder", Foyle and Sam investigate a factory where one of the suspects works, which is heavily guarded and under tight government security. It turns out to be [[spoiler: a factory run by the Ministry of Health for mass-producing wooden coffins to deal with the expected homefront casualties.]] You can almost see the anvils falling, but the effect is [[NightmareFuel chilling]].