I was watching Metamorphosis (4x04) for my If Clothes Could Talk project, and realized that:
Sam wears a different coat when he is inside Jack Montgomery's closet.
He arrives in a beige jacket, gets beat up - and then wakes up in the closet in one of his green jackets. When he busts out of the closet in heroic fashion, he is back in his beige jacket.
I think the show should hire me to keep track of these things. I'll be looking for a new job in August anyway.