Henry Knight
Vital statistics
Sex	Male
Nationality	British
Family	Father (deceased)
Appearances	The Hounds of Baskerville
Portrayed by	Russell Tovey Sam Jones

"Mr. Holmes, they were the footprints of a gigantic hound!"

―Henry Knight, The Hounds of Baskerville.

Henry Knight is a character has appeared on Sherlock's second series in episode "The Hounds of Baskerville". He is a client of Sherlock Holmes.

When he was a child his father was killed in front of his eyes. Traumatized, he was convinced a monstrous hound killed his dad. Later it is revealed that Bob Frankland was the murderer. Mr. Knight knew too much about Dr. Frankland's experiments with chemical weapons. Frankland wore a t-shirt with a picture of a dog and the acronym H.O.U.N.D. which was the reason why Henry rationalized the killer into a monstrous hound. Frankland haunts him during the night, by turning on the security lights repeatedly, leaving Henry terrified.