Bethany Geaber

Well-connected Special Agent Emily Prentiss joins the team, as they take on two serial killers, who seem to be in competition with each other.

Mina goes out of her way to help a young man from her neighbourhood who almost mugged her. Nic offers her assistance and discovers a secret that Mina has been keeping behind closed doors.

Much to Bell's dismay, Nic and Conrad decide to admit a homeless Jane Doe, whom they suspect was dumped off by another hospital during Chastain's big Charity Ball.

Conrad must diagnose a young woman who gets admitted after having extreme night terrors. Devon faces his first Halloween in the emergency room. Nic panics over her decision to bring her newly sober sister to Mina's epic annual Halloween party.

When Nic finds herself under investigation in Lily's death, Conrad comes to her defence, but ends up making the situation worse. During a routine surgery, Bell's patient accidentally catches fire.

Conrad's ex-fiancée, Catherine, is admitted to the hospital with abdominal pain that proves to be quite the medical mystery.