One Can Only Hope (S09E06)

Tensions between the nurses and doctors hit a fever pitch as a petition against Luka leaves the ER short-staffed; Abby's brother (Tom Everett Scott) returns with some all-too-familiar manic tendencies; Chen gives in to Pratt's less-than-tender loving care after a violent patient gets under her skin; and Nathan (Don Cheadle) irks – then impresses – Corday and Carter by talking a terminal patient out of giving up. (National Broadcasting Company (NBC))