The banter here moves at the speed of a tennis rally, and Hisoka rarely misses a return. The episode leans on reruns of earlier moments, which is nostalgic the first time and less so the fourth. Meet Hisoka, who has the air of someone who will be very important or very dead. Write down "Don't worry about us!"; it will matter more than it seems. Somewhere a prop department is very proud of the chance. Good enough that your phone stays in your pocket. Mostly.