For a romantic crime procedural comedy, Castle had an extraordinary range of sets. In the four seasons I worked on the show, we never had less than two swing sets in an episode, and we did everything from a Mars habitat to the sewers of Paris, with stops at secret, gothic crypts, and collapsed elevator shafts. Many were technically demanding; all the more so because we seldom used CNC machines or 3d printers (this was juuuuust on the cusp of that revolution). This meant that our construction crew did most work by hand that now would have been automated. This, in turn, meant that I had to produce drawings to explain what I wanted them to do. And all of them were done on an EIGHT-DAY TURNAROUND! It was fun, but don’t be surprised if you see scorch marks on the drawings.