Atmosphere and menace
This is a TV Movie in it's own right as opposed to being an episode in one of Jeremy Brett's Sherlock Holmes series.
The setting is very Hammeresque with coach and horses being driven at speed through wooded scenery. So Hammer fans should like this. But it is not clear whether the person who is suspected of vampirism is actually as he seems here. The superstitious villagers are convinced that he is. This forces their reverend to approach Sherlock Holmes to solve the mystery. Holmes goes to the village in order to calm the hysteria that is running through the community. His main concern is that the villagers may destroy an innocent man.
Watching this during the Covid19 lock-down was kind of appropriate. The deaths and illnesses in the village may be due to a virulent influenza epidemic.
There is plenty of atmosphere and menace that will please mystery fans. For once Holmes actually gives credence to the supernatural instead of dismissing it completely as he usually does. There are some good performances from English character actors. My favorite is the Reverend Merrydew played by Maurice Denham. Roy Marsden is really creepy as the mysterious stranger who is accused of vampirism.
I recommend this. So if you want to sample a good Jeremy Brett Holmes mystery try this one.