A Study in Terror is a 1965 British thriller film directed by James Hill and starring John Neville as Sherlock Holmes and Donald Houston as Dr. Watson. It was filmed at Shepperton Studios, London, with some location work at Osterley House in Middlesex.
The film had its world premiere at the Leicester Square Theatre in the West End of London on 4 November 1965 A Study in Terror presents the first film appearance of Mycroft Holmes.
Plot
Sherlock Holmes (John Neville) is on the trail of Jack the Ripper. In the dark alleys of London, the notorious Ripper has committed a series of gruesome murders when Holmes takes on the task of solving these horrific crimes. The process takes Holmes from the lowest rungs of society all the way to the peak of the aristocracy, discovering blackmail and family insanity everywhere he goes.