- The Home Guard stages an invasion exercise in "War Games" with Foyle appointed as a neutral observer. He suggests to the somewhat pompous guard commander that his rigid plans aren't realistic, and is summarily dismissed. The Guard is subsequently ambushed, foiled, and humiliated by the regular army who ignore the carefully-drawn lines and disguise themselves with the Guard's red flagging. When the commander appeals to Foyle over this violation of the rules and demands that he do something, Foyle responds that he's just a neutral observer and couldn't possibly interfere.
- In "Bleak Midwinter," the guilty party has broken into a hairdresser's. Foyle arrives and goes down to the basement to find that he's taken the shop's owner hostage and smashed through to the bank next door, where he's busy setting up explosives.Harry: Who the hell are you?
Foyle: I'm a policeman.
Harry: How'd you find me?
Foyle: [looking over his shoulder] I came through that hole in the wall.
Harry: Oh Grace, you bitch.
- Shortly after, when the suspect's nitroglycerin turns out to be regular glycerin instead.
Foyle: Fine sense of humor though.
- After the whole station is stumped by the swastika-in-a-square puzzle in "Casualties of War," Foyle walks in, glances at it, and casually suggests they look "behind" the four cards they're supposed to form a swastika with. Brooks realizes the meaningnote after everyone's left the room. Later, he goes in to put something on Foyle's desk and finds Foyle had already taken the time to solve the puzzle properly on his own.
- When Brooks comments that the higher-ups have finally done something right (by un-retiring Foyle), Foyle stops with his customary "right," and proceeds to declare that if he hears anything more like that, he'll kick Brooks out of the police force himself, and strides off. As soon as he's gone, Brooks smiles and says it's good to have him back.
- Frequently, when the murder investigations cross with "vital wartime operations", someone will comment at how the inconvenient it is that the man was murdered. Foyle's response is always "Particularly for him/her, don't you think?"
- In "All Clear", when Foyle's son Andrew asks Sam to marry him and she says she just wants to be friends.Andrew: Oh, very well. But you will marry me, Sam Stewart. If only to have my dad as your father-in-law.
Sam: *grins and says nothing.*
Funny / Foyle's War