Mark worries that his brain tumor may have returned, as Elizabeth tells him that she will leave him if Rachel is not sent back to St. Louis. Lewis has a busy day running the ER after several staffers come down with food poisoning after eating tainted bagels donated by a pharmaceutical company. Luka returns to cover shifts. Eleanor Carter flees the hospital after realizing how poor Mickey's condition is. Carter talks her into staying to comfort the boy during his treatment. Finding that Brian has beat Joyce yet again, Abby encourages her troubled neighbor to seek help in a group home. Brian later confronts Abby at her apartment and punches her for interfering. At County, Luka and Susan treat Abby, who has a broken nose and a few cuts and bruises. Luka finds Brian at a bar, and beats him, threatening to kill him if he touches Abby again.
Elenco: Maura Tierney , Parminder Nagra , Scott Grimes , Linda Cardellini , John Stamos , David Lyons , Angela Bassett , Laura Innes , Lily Mariye , Linda Cardellini , Maura Tierney , Mekhi Phifer , Noah Wyle , Parminder Nagra , Scott Grimes , Sherry Stringfield , Yvette Freeman , Eriq La Salle , Kellie Martin , John Stamos , Michael Michele , Erik Palladino , Angela Bassett , David Lyons , Chase Masterson , Swoosie Kurtz , Lisa Vidal , Laura Cerón .