The dead nurse in her coffin is shown in two different scenes. In BOTH she is visibly breathing and in one the ribbon around her throat is visibly moving with her pulse.
Watson: What is your theory, then?
Holmes: I have none. [pause; annoyed] I have insufficient facts to construct a theory!
The fifth series of Granada Television's adaptations is entitled The Case-Book of Sherlock Holmes.
This episode is based on Sir Arthur Conan Doyle's story The Disappearance of Lady Frances Carfax, which first appeared in The Strand magazine in December, 1911.