The end credits for this episode appear over a reprise of Holmes attacking Roylott's swamp-adder.
Watson: You evidently saw more in those rooms than was visible to me, Holmes.
Holmes: No… but I probably deduced a little more.
Holmes: I'm very sorry, Watson, but it seems to be the common lot this morning.
Sherlock: Mrs. Hudson has been roused. She retorted on me, and I on you.
Watson: But it's only a quarter past seven! What is it? A fire?
Holmes: No, no. A client.
"It is not cold which makes me shiver, Mr Holmes, it is terror."
This episode is based on Sir Arthur Conan Doyle's story The Adventure of the Speckled Band, which first appeared in The Strand magazine in February, 1892.
Click here to read the original story.