Still not fully recovered from the vicious attack that seriously injured him and killed Lucy Knight, Carter (Noah Wyle) finds himself face to face with Lucy's mother (Gwynyth Walsh). In other developments, Kovac (Goran Visnjic) commandeers a plumber's truck to rush a hit-and-run victim to the ER. Abby (Maura Tierney) handles a patient without Weaver's (Laura Innes) permission. Carol (Julianna Margulies) must tell a teenaged girl that she is suffering from something far more serious than a sexually transmittable disease. And Greene (Anthony Edwards) receives some bad news about his father (John Cullum). ~ Hal Erickson, Rovi