Watch a sneak peek of Season 15 Episode 18, ''What We Do''

A camera crew interviews the staff at County General for a documentary on emergency medicine. Morris' (Scott Grimes) cop girlfriend gets injured on the job and is rushed into the ER with gunshot wounds. Neela (Parminder Nagra) wonders why her relationship with Brenner (David Lyons) lacks so much communication. Sam (Linda Cardellini) struggles to make amends with her mother (guest star Amy Madigan). John Stamos also stars. Airing this Thursday March 5 at 10pm on NBC.

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