The author of the book "Oktober", which proves to be a clue in the mystery, is Stephen Gallagher, the writer of this episode.
Several characters in this episode are named after characters and authors of the Sexton Blake mystery series. George Marsden Plummer, Rupert Waldo aka Waldo the Wonderman, and Huxton Rymer were criminals in the series. Detective-Inspector Coutts sometimes worked with Blake. George Hamilton Teed and Edwy Searles Brooks wrote many of the stories.