As WW2 rages around the world, DCS Foyle fights his own war on the home-front as he investigates crimes on the south coast of England. Later series sees the retired detective working as an MI5 agent operating in the aftermath of the war.

[Andrew has joined his father on a fishing trip]
Andrew Foyle: I can't see the attraction of standing ankle deep in mud, trying to catch a fish too stupid to come any where near us.
DCS Christopher Foyle: Don't underestimate the intellegence of the average trout, and besides, they can hear you from forty feet away, so please try and keep quiet!
Samantha Stewart: [to Foyle and Milner] What you both need is a jolly good murder!
DCS Christopher Foyle: The uniform suits you.
Andrew Foyle: Thanks. I wish I could say the same about your dressing gown!