It seems surprising that Sir Author Conan Doyle’s most famous creation, Sherlock Holmes, and London’s most famous serial killer who stalked the Whitechapel neighborhood in 1888, were never brought together for one of Doyle’s novels. But the two were pitted against each other on screen for the first time in A Study in Terror (1966) and it’s one of the most underrated but entertaining entries among the Holmes-on-film mysteries created since the days of the Universal Basil Rathbone-Nigel Bruce series.