Holmes & Watson receive a letter from an informant who known by the pseudonym Fred Porlock. Porlock is a man well connected with criminals. The letter is written in code, and Holmes determines that the code comes from the words in a book. They decipher the code by page and column and find that John Douglas of Birlstone House is in danger.
Arthur Conan Doyle | Novel |
Peter Jennings | Editor |
Caroline Neave | Editor |
Roz Phillips | Production Manager |
Kim Craste | Animation Supervisor |
Norma Green | Director |
Norma Green | Adaptation |
Joy Craste | Production Coordinator |