ABBY FEARS FOR MISSING BROTHER WHILE CARTER FIGHTS FOR PREGNANT IMMIGRANT

While Abby (Maura Tierney) fears the worst when her AWOL brother (guest star Thomas Everett Scott) suddenly disappears, Drs. Carter (Noah Wyle) and Chen (Ming-Na) treat a frightened Chinese immigrant nanny (guest star Michelle Krusiec) whom they suspect was impregnated by her employer. Elsewhere, a new resident (guest star Don Cheadle) struggling to overcome his physical disability, tries to help in the E.R. but his advice to patients is unappreciated by his fellow doctors. In addition, Dr. Kovac (Goran Visnjic) cannot seem to quench his sexual appetites but his admirable resolve on the job to find an eye specialist to treat a young gunshot victim gets him into more trouble; Drs. Gallant (Sharif Atkins) and Harkins (guest star Leslie Bibb, "Popular") engage in an escalating game of one-upsmanship concerning their medical knowledge; Dr. Weaver (Laura Innes) gets some much-needed good news. Alex Kingston and Sherry Stringfield also star.