第 75 集: 宮谷達也因蟑螂事件失業，隨後得知利尻島的昆布受損情況。

75

Tatsuya Miyai is an earnest young man who works as an assistant in the kitchen of the Gourmet Club and impresses Kaibara with his tea making. One day, when he opens the kombu storage cabinet, a cockroach scuttles out and he notices a sheet with a hole in it. Kaibara angrily blames Miyai for not keeping the kitchen clean and fires him. Miyai is devastated, so his coworker Ryouzou Okaboshi calls Yamaoka for advice. They meet in the Okaboshi restaurant and after eating fresh sea urchins Yamaoka invites Miyai to join him and Kurita on a research trip to Rishiri Island. After arriving on the island, they go to an area where kombu is laid out to dry. Miyai sees kombu with a round hole in it and a worker explains it's caused by sea urchins and Yamaoka adds that a cockroach would eat kombu by nibbling at the edges. Meanwhile, Kaibara arrives on the island, and after realizing his mistake, rehires Miyai to work at the Gourmet Club and make tea for him again. (Source: Wikipeida)