Black Butterfly
Mark Gatiss
 It is 1953, shortly after the coronation of Elizabeth II. Box is now nearing retirement, and has also been left with an unexpected offspring, Christmas Box. However, he discovers that elderly pillars of the British establishment are meeting unexpected deaths through participation in reckless risk taking and accidents. He tracks the perpetrators to Istanbul, is assisted by Turkish-Geordie double agent Whitley Bey and meets Afro-Japanese gay agent Kingdom Kum, and also that the aforementioned figures were poisoned by a malignant chemical derived from the eponymous insect. From there, he travels to Kingston, Jamaica, where he meets the chief culprit behind his misadventures- the progeny of an old enemy, who is using a "New Scout Movement" to mask his mass poisoning schemes. With that resolved, Box is knighted, and renews the acquaintance of Queen Elizabeth the Queen Mother, whom he once met at a party on Armistice Day 1918.