After being abducted by Katarina Rostova, Raymond "Red" Reddington finds himself alone in hostile territory unsure of who, if anyone, he can trust. With few leads to go on, Liz and the Task Force venture into unknown danger as they race to find him.

Liz, Dembe and the Task Force continue to search for Red. Red attempts to escape his abductors with help from a surprise ally, but discovers he is not Katarina Rostova's only target in her hunt for information.

Aram goes undercover to infiltrate a secret society of wealthy thrill-seekers, whose entertainment hinges upon spectacular acts of violence. Meanwhile, Red tries to negotiate with a former associate involved in the Townsend Directive, while Katarina Rostova takes steps to insinuate herself into Liz's life.

Cooper's moral compass is tested when an officer whom he served with as young man, long presumed to be dead, resurfaces as a POW.

Liz and the Task Force investigate an infamous assassin who has a long history of weaponizing diseases, but has now turned to even more insidious activities. Meanwhile, Red and Dembe travel to Cuba in search of a lead, and Aram considers a new relationship.

Red alerts the FBI to the suspicious death of a scientist specializing in artificial intelligence research. Meanwhile, Francesca Campbell further entangles herself in Red's criminal activities

The Task Force investigates the unexplained disappearance and sudden re-emergence of a governor. Meanwhile, Red and Dembe surveil someone close to Katarina Rostova, as she inadvertently involves Agnes in an operation of her own.

Desperate for information about the whereabouts of a longtime friend, Red directs the Task Force to find a blacklister who specializes in untraceable money transfers. Meanwhile, Liz receives some disturbing news from her daughter Agnes.

Red and Liz investigate Orion Relocation Services, an organization that surreptitiously facilitates the disappearance and relocation of criminals. Meanwhile, Katarina delves into the memories of an old friend in order to get additional information about the Townsend Directive.

Red and the Task Force pay a visit to a former blacklister, as an explosive confrontation leads Liz to make a critical choice

With the help of the Task Force, Red tracks a gifted art forger who has thwarted his plans to sell stolen pieces. Aram’s love life becomes increasingly complicated. Liz and Ressler confide in each other.

Secluded on a private island, Red reunites with an old flame and a ring of thieves in a plot to make millions off stolen art. Plans are quickly derailed, however, when guests on the island mysteriously show up dead.

The Task Force investigates a series of attacks on data centers perpetrated by a blacklister with a peculiar condition, as Liz conducts a secret investigation on the side. Meanwhile, Glen desperately tries to prove his value to Red after a shipping mishap.

A blacklist case forces Liz to choose sides between Red and the Task Force. Meanwhile, Red tries to calm a panicked Ilya Koslov, who believes he is under surveillance.

Liz and the Task Force take on a cold case that may have some new victims. Meanwhile, Red tries to help a friend of Dembe who is in danger.

Ressler is forced to confront past trauma and family secrets when his brother takes him back home for a risky job.

As the Task Force investigates a kidnapping executed by seemingly impossible abductors, Dembe lands in a perilous situation. Meanwhile, a recent health scare causes Red to think about a successor.

The Task Force investigates an accountant who works for lucrative criminals in order to find the violent and thuggish brothers hired for his protection. Meanwhile, Liz must make a momentous decision.