=== Erfle ===An erfle is a 5-element eyepiece consisting of two achromatic lenses with extra lenses in between.
== Igralska zasedba ==* Basil Rathbone - Sherlock Holmes* Nigel Bruce - dr. Watson* Lionel Atwill - profesor Moriarty* Kaaren Verne - Charlotte Eberli* William Post Jr. - dr. Franz Tobel* Dennis Hoey - inšpektor Lestrade* Holmes Herbert - sir Reginald Bailey* Mary Gordon - gospa Hudson== Opombe ==V tem filmu se znotraj filmske serije prvič pojavi Dennis Hoey v vlogi inšpektorja Lestrada.