The Mysterious Death on the Underground Railway (S2E1): When a young woman is poisoned on a London subway train, the police searching for her killer appear to be on the wrong track. Bright young reporter Polly Burton decides to unmask the murderer herself, putting her own safety on the line in the process. It features Judy Geeson, John Savident, Richard Beckinsale, and Anthony Higgins. The Rivals of Sherlock Holmes is a British television anthology mystery drama series, which originally aired between 1971 and 1973. Adaptations of mystery stories written by Sir Arthur Conan Doyle's contemporary rivals in the genre.