Gintama: Season 2, Episode 41

2 - 41: The More Delicious the Food, the Nastier It Is When It Goes Bad

Gintoki, Shinpachi Kagura and Hasegawa are hospitalised (The Yorozuya gang for food poisoning from eating unfresh crabs; Hasegawa got knocked down by a car). They get themeslves involved when a young nurse falls in love with one of her patients.