Sherlock waits to see where Moriarty will make his posthumous move. 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, something with its roots deep in Mary Watson's past?
Did You Know?
The deductions that Sherlock makes about the man with the large hands and the Japanese tattoo is similar to the deductions Sherlock Holmes makes in the original Arthur Conan Doyle story "The Red-Headed League". See more
(50:48) When Sherlock is talking to Mycroft the boom mic is visible bobbing above Sherlock's head. See more
What you're about to see is classified beyond top secret. Is that quite clear? Don't minute any of this. Once beyond these walls, you must never speak of it. A D-notice has been slapped on the entire incident. Only those within this room, code-names Antarctica, Langdale, Porlock and Love, will ever know the whole truth. As far as everyone else is concerned, going to the Prime Minister and way beyond, Charles Augustus...
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During the end credits, several letters are colored red. When read sequentially, they spell out "The Six Napoleons", the title of the Arthur Conan Doyle story that this episode is loosely based around. See more
References The Exorcist
Sherlock Theme Song
Performed by David Arnold
and Michael Price See more