The door...
I haven't seen anyone mention the door. In at least one seen the 1003 on the door was written on masking tape...that had to mean something.
shareIt looked like the door started out being quite dirty and scratched, and then on the first day it was painted light blue, with masking tape labeling the door. The following day the metal numbers had been replaced. By yet another day, the door was back to being nasty and dirty dark-brown.
Still don't know the significance of this though.
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"Gentlemen, you can't fight in here! This is the War Room!"--Pres. Merkin Muffley