The BAU team opens an investigation when a man appears, claiming to be Dr Tara Lewis' brother, knowing everything about her and her family.
After losing her teaching job, Vanessa drives her family members crazy by spending all of her time hovering over them; Ryan and Kyle compete to see who knows more about zombies and how to survive an apocalypse.
When a cop on the verge of shutting down a major drug operation is abducted, Hondo and the squad race to save one of their own before it's too late; Luca grows concerned about sudden changes in Hicks' behaviour.
Jack tries to use his own students to get revenge on his rival; Principal Durbin attempts to control Jack, but is failing.
A student gets hurt when Jack leaves his class unattended; The students get excited about a substitute teacher.