* FanPreferredCouple: Despite a 27-year age difference between the characters, 73 percent of Foyles War related fanfics found on FanFictionDotNet as of the beginning of 2012 romantically pair Christopher Foyle and his driver Samantha Stewart.
* 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]].
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