The nurses' petition against Kovac (Goran Visnjic) leads to heightened tensions and a personnel shortage at the ER. Abby (Maura Tierney) has her doubts when her brother Eric (Tom Everett Scott) claims to be on leave from the Air Force. Pratt (Mekhi Phifer) offers comfort to Chen (Ming-Na), who hasn't quite gotten over being held at gunpoint by a disgruntled patient. And Corday (Alex Kingston) and Nathan (Don Cheadle) argue over a seriously ill patient (Nora Zimmett) who refuses to be resuscitated by "heroic measures." ~ Hal Erickson, Rovi