S15E2 "Another Thursday At County"

This week: The writers decide to throw FIVE new characters at us (including four new interns), Morris has already had enough of the new ER chief micromanaging everyone, Dubenko's departure leaves Crenshaw massively overworked, Sam contributes to a guy killing himself, and a small act of bioterrorism forces the ER to evacuate while Gates and three of the interns are stuck in the middle of it.