Twenty years earlier, aged seven, young Henry Knight saw his father torn to pieces by a monstrous creature at Dewer's Hollow near their Dartmoor home. Now Henry has seen the footprints of a huge beast and suspects that the nearby Baskerville government research station is breeding mutant animals. Sherlock and John travel to the moor where local lad Fletcher organizes tourist walks cashing in on the legend of Dartmoor's spectral hound. Using false I.D. the pair infiltrate Baskerville and are challenged by secretive Major Barrymore but rescued by sympathetic Dr. Frankland, a friend to Henry. After Sherlock himself sees the monstrous creature he enlists the help of geneticist Dr. Stapleton to help him solve the mystery.
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Did You Know?
The titular hound is completely CGI - the greatest use of effects used in any other episode in "Sherlock". See more
When Sherlock and John arrive on Dartmoor, the sun rises up and to the left. Since the scene was actually shot in Dartmoor, and not in the southern hemisphere, this footage must be of a sunset played in reverse. See more
I never did ask, Dr. Frankland. What exactly is it that you do here?
Ah, Mr. Holmes, I would *love* to tell you, but then, of course, I'd have to kill you.
That would be tremendously ambitious of you.
Liberty Bell March
Written by John Philip Sousa See more