Oh ha, I should have just watched on
Metatron actually explains where Inspector Gregory is from…
…that makes me think there really IS something ~significant about that character and that story in relation to spn. Perhaps I will give it a read.
(I may even have read it before… I have all Sherlock Holmes and read a ton of the short stories as a kid… but they all kind of merged together after a bit…)
(referencing Sherlock Holmes is probably also a nod to the Sherlock fandom, since that’s obviously v. big at the moment what with the BBC version, Elementary and the films)