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?
Amanda Abbington reported that the scene where Mary is speaking with an exaggerated American accent was written into the script because she and Steven Moffat regularly joke around the set by speaking in silly accents. 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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Right after the end credits Mary's video cuts back and Mary says "Go to hell, Sherlock". See more
References The Omen
Sherlock Theme Song
Performed by David Arnold
and Michael Price See more