KAY'S LAST STAND; Kay must face Elizabeth Phelps (Julie Kavner), the shadowy CEO of a major insurance company, to ask her to put Kay's invalid mother back on her medical plan. AUTO EROTICA; The psychotic, nymphomaniac Brenda has a man she met on a California freeway (Sam McMurry) arrested just to meet him. WAITING; Nancy (Julie Kavner) visits her neurotic friend Audrey (Tracey Ullman), who has been waiting several days for the washing machine repairman to show up at her house. GRANDPA AND THE KIDS; Grandpa Simpson tells Bart, Lisa and Maggie boring stories of his life, and then plays a practical joke by playing dead.