

Sherlock Holmes and Dr. Watson find themselves in 1890s London in this holiday special.
Production
Victorian set design that cost more than some actual period films.
Acting
Cumberbatch's cocaine-hyperactive Sherlock in a top hat.
Direction
Seamless genre-hopping that loses half its audience on first viewing.

Director
Douglas Mackinnon
Trivia, insights & behind the scenes
The episode was filmed in January 2015, between Sherlock seasons 3 and 4, with sets built at Bristol's The Bottle Yard Studios.
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