Halloween at Chastain proves to be just as spooky as ever when Conrad is tasked with diagnosing a young woman admitted to the hospital with extreme night terrors. Meanwhile, Devon faces his first Halloween in the ER, Nic panics over her decision to bring her newly sober sister to Mina's epic annual Halloween party and Bell finds an interesting way to make use of his new assistant.
Elenco: Matt Czuchry , Manish Dayal , Bruce Greenwood , Malcolm-Jamal Warner , Shaunette Renée Wilson , Emily VanCamp , Jane Leeves , Jessica Lucas , Anuja Joshi , Melina Kanakaredes , Morris Chestnut , Moran Atias , Merrin Dungey , Andrew McCarthy , Kaley Ronayne .