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.
- Shortly after, when the suspect's nitroglycerin turns out to be regular glycerin instead.
Harry: Oh Grace, you bitch.
Foyle: Fine sense of humor though.