Season 4, Episode 1 The Sign of Four
First Aired: August 26, 2009
"The Sign of Four," in which Holmes and Watson investigate the long-ago disappearance of a woman's father. Miss Mary Morstan: Jenny Seagrove. Jonathan Small: John Thaw.
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- Premiered: April 24, 1984
- Rating: None
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- Premise: Sir Arthur Conan Doyle's legendary detective uses his keen powers of deduction in a series of cases which first aired on PBS's 'Mystery.' (more)