The loading dock establishing shot...

I'm going to need to rent a greenscreen studio for this shot, but it will be worth it. This will establish the entire prologue with the addition of a Western Union Messenger Boy who has an important message for Mulvey. This bit of business was the key to figuring out how to have Mulvey agree to build the bathysphere for the next story without coming off as a wimp.

People will be moving around as the boy enters and walks about halfway to where Mulvey and Grimmauld are arguing.