A long, cold night finds ER staffers with hours of time to kill. Kerry recruits staffers to participate in a study on sleep deprivation combined with physical activity. Gant appeals to Anspaugh after a public scolding from Benton. Carter ditches Dennis again to escape his whining, only to discover deadly results. Peter is denied a recommendation from Keaton one last time before she leaves for Pakistan. Mark and Chuny discover that they have a lot in common. Carol is at a crossroads when management demands she cut two RNs. Charlie comes into the ER severely beaten.
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 .