John Madden again brings a cinematic quality to The Disappearance of Lady Frances Carfax.
Dr Watson is in the Lake District and recounts the tales of the eccentric Lady Carfax to Holmes in London. She had a near miss when she fell of a boat that she used to attend church. A disabled war veteran swam out to rescue her.
However Holmes then joins Dr Watson as he senses this independent minded lady might be in danger from a missionary who is in Britain to raise funds.
By the time Holmes arrives, Lady Carfax has gone missing after she encountered a face from her past.
A solid story with a hint of a dark ending with Holmes finding himself temporarily flummoxed with his analytical skills. However you cannot keep a lid on a good detective.
The way the story is presented, it could initially go several ways, the villain here is devious and quick to improvise.