Roy Marsden: Roy Marsden. Actor: The Sandbaggers. Marsden's credits are numerous and span a half century of widely, and wildly, different genres and character types. Not the least is his portrayal of the mysterious and mystical character John Stockton in the long-running ITV series The Case-Book of Sherlock Holmes (1991) starring Jeremy Brett. In The Last Vampyre (1993) Marsden brings, literally to life, Sir Conan Doyle's take on the ages' old, indeed...