In this episode, we focus on the fitting, shaping and polishing of the cast bronze Hanging Knees. We cast the last Floor, and production is speeding up in the foundry, with an average of two pieces being made every day! Meanwhile, Matt makes THOUSANDS of copper rivets for fastening the hull planking, and Pete fastens more floors into place - taking advantage of different fastening techniques in the areas where bolts cannot be used. Rowan returns to the project, and tries - unsuccessfully - to finally make friends with Pancho.