Five Hundred Carats (S2E2): Tensions reach the breaking point in the small mining town of Kimberley, South Africa, after the daring theft of the DeBeers diamond. Insp. Lipinzki leaves no stone unturned in his hunt for the precious rock. The more he digs, the more deadly become the stakes for everyone in Kimberely. It features Barry Keegan, Patrick Barr, Martin Jarvis, and Richard Morant. 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.