By now convinced that her friend Dr. Lawrence (Alan Alda) is in the early stages of Alzheimer's, Weaver (Laura Innes) dolefully conspires with Greene (Anthony Edwards) to force Lawrence to face his problem. A nursing-home fire brings in a multitude of patients and heap of trouble for Carter (Noah Wyle). Carol (Julianna Margulies) goes out on a limb to help the pregnant, heroin-addicted Meg (Martha Plimpton). Dr. Dave (Erik Palladino) may have caused the explosion that has been blamed on Cleo Finch (Michael Michele). And Jeanie Boulet (Gloria Reuben) bids goodbye to the ER. ~ Hal Erickson, Rovi