The orginal set for Castle was the Agent’s mobile command center. I then built the top level out of the command center and expanded it. The basement level was the orginal medical center. I split it in to two rooms which can be changed as needed. The middle level is the new med lab. It uses some of the old med lab parts and an Avengers set. It may get redone again in the future. All three levels stack on top of each other, a blank base can be used as a roof or floor as needed. The back sides are designed to be a hallway. The “153rd -vs- Black Knight” uses the floor and back side of the sets for the scene.