by Sir Arthur Conan Doyle.
Dramatised by Giles Cooper.
[Starring] Douglas Wilmer as Sherlock Holmes, Nigel Stock as Dr. Watson
and Peter Wyngarde as Baron Gruner
with Rosemary Leach and Jennie Linden
Holmes is commissioned by a mysterious client, 'one of the most exalted in the land', to free a beautiful girl from the clutches of a dangerous criminal. It proves to be a hazardous operation for all concerned.