Alan Alda makes the first of several guest appearances as crusty attending physician Dr. Gable Lawrence, an old friend and mentor of Kerry Weaver (Laura Innes). Lawrence's pomposities -- to say nothing of his eccentricities -- do nothing toward endearing himself to Greene (Anthony Edwards). Meanwhile, the ER is the scene of a brief shoot-out; Kovac (Goran Visnjic) and Lucy (Kellie Martin) try to persuade a woman patient to get out of an abusive spousal relationship; Carter (Noah Wyle) is there for comfort and reassurance as his former sister-in-law, Elaine (Rebecca De Mornay), undergoes a mastectomy; and Jeanie (Gloria Reuben) is given temporary custody of an HIV-positive baby. ~ Hal Erickson, Rovi