While continuing to battle Berlin, Red faces a new threat in the form of Lord Baltimore. A figure from Red's past returns. Liz tries to move on after her showdown with Tom.

A robbery provides Red with an opportunity to take down a questionable bank. Liz questions Red's intentions during the course of her investigation. An impressive addition is made to Cooper's team.

When a body is found missing a heart, Liz and Ressler join forces with Samar Navabi to investigate Dr. Covington's operation. Red and an associate try to take advantage of an opportunity in Indonesia.

Red thinks a dangerous sociopsychological experiment may be taking place when several previously nonviolent citizens become killers. Red has a complicated proposition for Naomi and her husband.