Blair comes up with a devious plan to take down her new teacher, Rachel. Chuck has no recollection of what happened to him when he wakes up in a hotel….

When Danny is put on modified assignment after an incident in which a cop–who failed to identify himself–is shot, he faces Internal Affairs investigators, who are looking to his state…

Danny, Erin and Frank work together to seek justice when the main suspect in a rape case is protected by diplomatic immunity.

A serial killer from Liz’s past strikes again while Red hunts for whoever betrayed him.