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His Last Vow

"His Last Vow" – A case of stolen letters leads Sherlock Holmes into a long conflict with Charles Augustus Magnussen, the Napoleon of blackmail, and the one man he truly hates. But how do you tackle a foe who knows the personal weakness of every person of importance in the Western world? Shown from left to right: Martin Freeman as John Watson and Benedict Cumberbatch as Sherlock Holmes (Photo by: Robert Viglasky/Hartswood Films for MASTERPIECE)

'Sherlock' Season 3

Yahoo TV

Benedict Cumberbatch and Martin Freeman return as Sherlock Holmes and Doctor Watson in three new episodes of the contemporary reinvention of the Arthur Conan Doyle classic, written and created by Steven Moffat ("Dr. Who") and Mark Gatiss ("Game of Thrones"). "Sherlock" Season 3 airs Sundays on PBS.