OMG you guys, Dum Dum Dugan is in this episode.
Ahem. Also; 'The Iron Celing' is the fifth episode of Agent Carter, and quite comfortably the best, not just because of Dum Dum, but also because it changes the scenery, places Peggy on a real mission, fleshes out Chad Michael Murray's Agent Jack Thompson, and gives us a real taste of the breadth and color of this Marvel Universe. The only thing I didn't really like was the title, a too-cute hybridization of Iron Curtain and Glass Ceiling that doesn't ultimately capture what the episode was about.
'The Iron Ceiling' was directed by Peter Leto and written by Jose Molina. And Dum Dum Dugan was in it. Let's recap it, SSR-style.