While continuing her investigation into the truth about Tom, Liz testifies against drug lord, Hector Lorca. Later another witness is abducted when he is forced to testify against the dangerous drug trafficker. Red’s interest is peaked and he informs the team that the witness may have been taken by "The Stewmaker" a man responsible for hundreds of missing and presumed dead people. Meanwhile, in an unlikely twist of events, Red and Ressler must work together for the first time.

Red and the FBI try to stop a dangerous messenger (Robert Knepper) whose appearance is unknown; Liz is thrust into a kidnapping plot.

Tom claims he is innocent and wants to turn the box into the FBI; Red's next target is a beautiful and deadly corporate terrorist (Margarita Levieva).

The FBI searches for the man responsible for a chemical attack on a subway; Liz wants to avoid Red after he implicated Tom.

When Red reveals a new name, Liz learns of a plot to destroy the country's financial system; Tom helps Liz when a loved one falls ill.

Anslo Garrick, the newest person on the blacklist, tries to capture Red; Liz is caught in an elevator.

Liz infiltrates the blacksite and disarms the signal jammers to call in backup but runs into trouble along the way. The fate of Ressler hangs in the balance as Red tries to bargain with Anslo Garrick. Meanwhile, Tom becomes increasingly worried about Liz’ situation and the fate of Red is unknown.

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