No sooner has Lewis (Sherry Stringfield) returned to County General than she clashes with Weaver (Laura Innes) over the treatment of a pregnant teenager in danger of being deported. Elsewhere, Weaver nervously prepares to contact her long-lost birth mother. Elizabeth (Alex Kingston) is investigated after losing a fourth patient to infection in post-op. Benton's (Eriq La Salle) son, Reese (Matthew Watkins), disappears. And Carter's (Noah Wyle) grandmother Millicent (Frances Sternhagen), injured in a fall, is brought into the ER. ~ Hal Erickson, Rovi