S2·E2 Mary Nightingale

Lester comes home from work sick, with the assumption that he has the flu. Using a bell that Sandra gives him, he drives Mary crazy with his demands for ""water"" and ""celery salt"" for his soup. She just assumes that he is being a big baby. Asking Brenda to watch Lester for a little while, Mary goes shopping and gets a pedicure and manicure (something she was not able to do earlier with Pearl and Rose). When she returns, Lester is being carried into an ambulance because he has appendicitis and needs to go to the hospital.

Mary is worried to death because she can't see Lester in the operating room, so she sneaks in. The operation is OK.