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"Sherlock" is a detective show based on the works of Sir Arthur Conan Doyle. The show is a modern-day update of the Sherlock Holmes stories and first aired on BBC One and BBC HD in the summer of 2010; the show is aired on PBS stations in the United States. The show has run for two seasons, with a third scheduled to begin production in early 2013. Each season has featured three 90-minute episodes.

The show was created by Steven Moffat and Mark Gatiss, who are also the executive producers. Moffat and Gatiss also write one episode each per season, as does Steve Thompson. Each episode is based on one of the original Sherlock Holmes stories. Although each episode features many similarities to the original story, the details of the plot and the ending are often changed, keeping even devoted fans of the original stories guessing.

The title role of Sherlock Holmes is played by Benedict Cumberbatch, whose other film credits include "Hawking,""Amazing Grace," and "Atonement." His work in "Atonement" drew the attention of Moffat and Gatiss, who targeted Cumberbatch for the role. Cumberbatch has drawn praise for his portrayal of the cold and calculating Holmes; his performance caused the writers to change the character for the second series to more effectively make use of his skills.

Dr. Watson, Holmes' faithful companion, is played by Martin Freeman. His other credits include "The Office,""The Hitchhiker's Guide to the Galaxy," and "Love Actually." In this modern update, Watson is a veteran from the Afghanistan conflict who struggles to adapt to life away from combat. The friendship between Watson and Holmes is a recurring theme throughout the show. Freeman won the BAFTA award for Best Supporting Actor for his work as Watson.

Andrew Scott plays Jim Moriarty, Holmes' archenemy. Scott has also appeared in "Lennon Naked,""Dead Bodies," and "My Life in Film." In casting Scott, the creators of Sherlock stated that they wanted to break the mold of Moriarty as a dull and posh villain. Scott has been praised for his portrayal of the manic and psychotic Moriarty and won the 2012 BAFTA award for Best Supporting Actor for his portrayal of Moriarty.

Rounding out the cast are Una Stubbs as Mrs. Hudson, the landlady of 221B Baker Street; Rupert Graves as Detective Inspector Greg Lestrade; and series co-creator Mark Gatiss as Mycroft Holmes, Sherlock's well-connected older brother.

Sherlock is a series that is currently running and has 4 seasons (13 episodes). The series first aired on July 25, 2010.

Where do I stream Sherlock online? Sherlock is available for streaming on BBC America, both individual episodes and full seasons. You can also watch Sherlock on demand at Netflix, Amazon, PBS, Vudu, Microsoft Movies & TV, Google Play, iTunes online.

BBC America
4 Seasons, 13 Episodes
July 25, 2010
Crime Drama
Cast: Rupert Graves, Louise Brealey, Mark Gatiss, Vinette Robinson, Zoe Telford
Watch Episodes
Clips & Extras

Sherlock Full Episode Guide

  • Long buried secrets finally catch up with the Baker Street duo. Someone has been playing a very long game indeed and Sherlock and John Watson face their greatest ever challenge. Is the game finally over?

  • Sherlock faces perhaps the most chilling enemy of his long career: the powerful and seemingly unassailable Culverton Smith - a man with a very dark secret indeed.

  • One mysterious case in particular baffles Scotland Yard - but Sherlock is more interested in a seemingly-trivial detail. Why is someone destroying busts of the late Prime Minister Margaret Thatcher? Is there a madman on the loose? Or is there a much darker purpose at work?

  • Sherlock Holmes and Dr. Watson find themselves in 1890s London.

  • Lady Smallwood tasks Sherlock with locating some letters of her husband's that newspaper publisher Charles Magnussen is using to blackmail her. However, the situation turns personal when Sherlock discovers that Magnussen also holds blackmail material on someone close to him.

  • Sherlock tries to endure making the best man's speech at John and Mary's wedding. However, he becomes distracted by the fact that one of the guests is a killer's target.

  • Two years after Sherlock's supposed death, he goes back to London and finds John has moved on.

Sherlock News

Russian 'Sherlock' Leak Was Mistake, Not Hack

A Russian TV network said an employee's mistake, not a criminal act, led to last week's leak of the series' season finale.

'Sherlock' Ends Season with Low Ratings, Russian Piracy

Although the series' UK ratings remain high, they've been off their peak with the long-delayed fourth season. However, Russian pirates were apparently still eager to see the season finale before it legally hit the airwaves.

Too Little, Too Late? 'Sherlock' Ratings Down

Fans of Sherlock had been waiting three years for new episodes, and it looks like some of them might have forgotten that they were waiting.

New Season of 'Sherlock' Rings in 2017

It seemed like Holmes and Watson might never return, but they're back this week with the first of three new episodes.

'Sherlock' Season 4 Gets a Release Date

Benedict Cumberbatch and Martin Freeman are very busy actors, but they apparently found enough time to make three more episodes of the popular detective series.

Will Moriarty Return in 'Sherlock' Season 4?

If you think that Jim Moriarty is no longer a problem for Benedict Cumberbatch's Sherlock Holmes, you might be in for a surprise in the series' upcoming season.

Sherlock Season 4 Finally on Its Way

Benedict Cumberbatch and Martin Freeman have been so busy that they haven't had time to work on a new season of Sherlock. Lucky for fans, they've at last been able to fit the series into their schedules.

Here's Ian McKellen as an Elderly Sherlock Holmes in 'Mr. Holmes' Trailer

Gandalf/Magneto as Sherlock Holmes? Yes please.

Benedict Cumberbatch's Fiancee is Pregnant!

Sherlock is going to be a daddy!

Benedict Cumberbatch Describes What Sex with Sherlock Holmes Would Be Like

So...Benedict Cumberbatch basically read off some erotic fanfiction.

Find Out Why Benedict Cumberbatch Is 'Completely Terrified' of the Word 'Penguin'

Turns out the award-winning actor has a weakness.

'Sherlock' Returning For Season Four, With Three Episodes and a Special!

"Sherlock," the hit BBC/PBS series, had its fate up in the air for a time, as both of its stars (Benedict Cumberbatch and Martin Freeman) were considerably busy shooting other projects. Finally, a season 4 has been announced! What is in store for Sherlock and Watson?

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Sherlock Video Clips & Extras

Sherlock: Emmy Awards 2014 - BBC One Clip (00:21)