As their infant son's fate hangs in the balance, Luka and Abby struggle to make the right decisions and keep the faith. Maggie arrives, determined to help. Luka's status seems uncertain as the hospital board considers a permanent solution to the Clemente affair. Sam returns, unsure of what the future holds for her. The ER struggles to get back to normal, as old staffers play new roles, and new personnel come on board.
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 .