When Sheldon has to spend a few days in the hospital, he turns into the world's worst patient. Also, Missy gets a taste of what life would be like without her twin.
A religion is a belief system with rituals. The missionary kopimistsamfundet is a religious group centered in Sweden who believe that copying and the sharing of information is the best and most beautiful that is. To have your information copied is a token of appreciation, that someone think you have done something good.