Lights Out

S13 E20: In a busy emergency room, Kovac feels the pressure to take care of the overflow of cases before the area is shut down for renovations. A lonely Sam befriends terminally ill photojournalist Diana Moore (recurring guest star Annabella Sciorra), who has a negative outlook. Pratt gets a scare when his brother unexpectedly shows up in the emergency room. And the tension between Gates and his father, Mike (recurring guest star Stacy Keach), reaches a boiling point.