In the MP graveyard scene Mycroft says "Cherchez la femme," and upon rewatching THoB Sherlock says "Cherchez le chien," when he has his anxiety attack at the inn after he claimed to see the hound. What do you make of it? Coincidence?

Hmmm. Well, certainly it’s supposed to reference the THoB moment, perhaps reminding us that Sherlock is scared and drugged (reminding us that this is not a real scene), but other than what I wrote in my Graveyard meta, I’m not really sure it’s meant as anything other than various aspects of past episodes leaking into his brain. BUT, I’m certain there’s more to it than that, and am interested in learning more.

Anyone have any thoughts on this?