Sherlock Holmes is in a foul mood. His most recent chemical investigation has been brought to a premature end by a broken test tube. Perhaps a stroll through London with Watson will cheer him up? When they return, they will find Dr. Trevelyan nervously waiting for them. The good doctor's resident patient is in a pitiable state. Someone has been sneaking into his rooms. He may even know who it is, but can't bring himself to tell anyone. Holmes had better change his mind quickly before things turn deadly...

After the read, Jay and Tony talk Conan Doyle's self-plagiarism, how this story connects to "The Cardboard Box," and tease an upcoming announcement.