The Adventure of the Crooked Man (Unabridged‪)‬

Watson joins Holmes late one night as the detective takes on the case of an army officer who has died an apparently violent death. He is found in a pool of blood, his head savagely struck during an argument with his wife, who is now incapacitated by the traumatic event. Yet there is evidence that suggests the presence of a third party in the locked room - and even a strange, curtain-climbing animal of unknown origins.