Misha Collins posted this video about designing the set for an upcoming episode. It includes upcoming guest stars.
Jerry Wanek give us a tour of the building of this set.
I’m here with @robbenedict touring an awesome set designed by the handsome, strapping, witty, and soft-skinned @jerrywanek
Posted by Misha Collins on Wednesday, April 6, 2016
I found how they put the sets together to be fascinating. Enjoy!