Sherlock

His Last Vow - S3-E4

Factual error: Sherlock takes pains to explain in detail that he will deliberately corrupt the magnetic code stripe on an access control card he intends to use to enter the elevator to the villain's penthouse, by carrying it next to an operational cell phone. (This is possible due to the low frequency magnetic field from a phone's vibration motor.) But when he actually goes to access the elevator, he simply touches his access card to the reader instead of swiping or inserting the card through a slot, which is how a magnetic stripe reader would operate. The elevator uses an RFID proximity reader, not a magnetic stripe reader - a phone wouldn't corrupt an embedded RFID tag.

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Stringman

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Quotes

Sherlock Holmes: Punch me in the face.
John Watson: Punch you?
Sherlock Holmes: Yes, punch me in the face. Didn't you hear me?
John Watson: I always hear "punch me in the face" when you're speaking, but it's usually subtext.

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Mistakes

When Sherlock is backstage at the circus and finds the yellow spray paint, he draws a line on the mirror. In the next shot, the line he drew is completely different (and in fact is more of a squiggle).

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Trivia

Sherlock's parents are played by Benedict Cumberbatch's real-life parents, Wanda Ventham and Timothy Carlton.

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