Complete fourth season of the television series that focuses on the lives and activities of the doctors and staff of a Chicago hospital's emergency room.

Title from container. Originally broadcast in 1997-1998. Special features: 2 intense examinations of the historic live season opener, Ambush ; Anatomy of an ambush ; live post show: how cast and crew wound down after Ambush aired ; outpatient outtakes: deleted scenes on select episodes ; cutups: gag reel.

Disc 1. Ambush.Something new. -- Friendly fire. -- When the bough breaks -- disc 2. Good touch, bad touch. -- Ground zero. -- Fathers and sons. -- Freak show -- disc 3. Obstruction of justice. -- Do you see what I see? -- Think warm thoughts. -- Sharp relief -- disc 4. Carter's choice. -- Family practice. -- Exodus. -- My brother's keeper -- disc 5. A bloody mess . -- Gut reaction . -- Shades of gray -- disc 6. Of past regret and future fear. -- Suffer the little children. -- A hole in the heart.