Trivia Facts | Top Quotes | Goofs/Mistakes
  • The incident with the butterfly bombs was set in a peaceful rural village in this episode. It was based on a real-life event which took place in the port of Grimsby and which caused serious disruption in the town for a week while the bombs were being defused. The government imposed a complete news blackout so the Germans would not discover how serious the effect of their butterfly bombs was. The Germans did not drop butterfly bombs on any other town afterwards.
  • SPOILER: A "camouflet" is a underground chamber created when a bomb explodes but doesn't break the surface. The explosion creates carbon monoxide and other noxious gases, which is why Mulley is rendered unconscious and his mates are gasping and coughing.