The really good thing about having back to back episodes is not having to wait a week for a story arc to play itself out. Mandy Moore gets the patented Scrubs Celebrity Fan Blower Treatment and between this and her guest arc on Entourage has proven herself to be a good sport about stuff like this.
Although they seem to be making J.D. goofier than normal this season even by Goofy J.D. Standards.
Well, we do see Cap both in his Ultimate costume (which I hate) and in his classic costume with the real shield, so that's definitely going to get addressed. I also caught a glimpse of what looked like Cap breaking loose from somewhere.