Forced by Romano (Paul McCrane) to work a few shifts in the ER, Elizabeth (Alex Kingston) has a run-in with Lewis (Sherry Stringfield) -- and learns for the first time about Greene's (Anthony Edwards) inoperable tumor. Elsewhere, two girls involved in a campus stabbing incident are brought into the ER. Chen (Ming-Na) handles a victim of severe trauma. And when Weaver (Laura Innes) tries to find out if her girlfriend, Sandy Lopez (Lisa Vidal), has been injured in a fire, she is in for a big surprise. ~ Hal Erickson, Rovi