Surprise episode. No outline, no agenda, no idea what the topic is until they're rolling. Once they land on roofs, it turns out there's a lot more to decide than a triangle and some shingles. Katie and TJ get into roof shapes, why the very first question any roof has to answer is where the water goes, why the pitch you choose controls what material you're even allowed to put on top, and what happens where two roofs meet. Along the way there's the raise-the-roof hand gesture, high socks making a comeback, and low-rise jeans that TJ feels very differently about as the father of a daughter than he did as a teenager. There's a pitch for a roof-types TikTok dance, a lobbying effort to rebrand the "stick-built" roof, and an ending that arrives, as it must, at enchiladas.