Holmes wearing the black cloak
I refer to the part when Holmes surprises Watson at the abbey ruins at night. Holmes makes a Dracula-like entrance wearing a black cloak, Then he throws the cloak over a dead body. He thinks it is the body of Sir Henry.
Sir Henry is played by Christopher Lee. Dracula had been played by Lee dressed in a similar cloak the year before. So when Holmes throws the cloak over the dead body it seems like an ironic gesture. Like saying "Here's your cloak back Drac." Perhaps a bit of Hammer fun going on at this point I'm thinking.