Kirk’s on vacation, so pinch-hitter-in-chief Katie Willert is back in the “studio” to fill in for the Kragman. She and Paul are taking it easy for the Los Angeles summer heat wave, eschewing a themed episode entirely. Which means it’s time for another “Music Raygun” grab bag episode. Paul goes weirdly nostalgic for this one, digging up a bunch of vintage clips while Katie keeps things ever-so-slightly more current. But other than that, be prepared to follow your hosts wherever the wind and their fancy takes them.