Encontrei um obscuro Blog do Tumblr que tem um vídeo sobre isso em discussão. Infelizmente, não é embebido aqui, então vou tentar resumir os pensamentos e comentários do elenco de Mark Gatiss. São apenas alguns minutos.
Cumberbatch.
"I think I'm out of control over Molly Hooper. Now does that mean I love Molly Hooper? I don't think I've made that decision yet".
"I don't think we've ever seen his emotions as out of control as in that moment..but I think that's because he's brought to boiling point by the situation rather than it being some kind of cathartic turning point."
Gatiss
"The smashing of the coffin is interesting because [snip]..I wanted Sherlock to have a kind of release of that kind... of the fury he's feeling of being manipulated like this.
"You know, Euros knows what she's doing, she knows what buttons to push to make Sherlock emotional."