The FBI task force's hunt for revenge nears its endgame. As Reddington and the team close in on the mysterious arch-criminal responsible for recent tragic events, they're forced to operate outside their comfort zone – and outside the law – in order to take down their enemy once and for all.

As Reddington and the task force close in on the person responsible for Liz's death, a shocking betrayal leaves them racing to save one of their own.

After Liz is abducted by a man claiming to be her father, Red sets out to find her at any cost. Meanwhile, the Task Force grapples with the shocking news that Liz is still alive.

Red enlists Tom and the Task Force to help track a notorious bounty hunter who may know Alexander Kirk's next move. Meanwhile, Liz struggles to decide if Kirk is trustworthy.

Red and the Task Force take extreme measures to hunt down one of Alexander Kirk's allies, Miles McGrath, a "criminal incubator" who finances crimes for profit. Meanwhile, Liz learns more about her family.

As Red sets Liz and the Task Force on the trail of an eco-terrorist with a mysterious connection to Alexander Kirk, Tom takes matters into his own hands.

Liz's loyalties are tested as Red takes action on an operation to intercept Alexander Kirk. Meanwhile the Task Force races to find a killer who targets inventors of revolutionary technology.

When Alexander Kirk contracts a mysterious group that specializes in hacking the world's most secure computer systems, Red and Liz see an opportunity to make a move on Kirk's ..

Red directs the Task Force to track down an individual who provides new identities to criminals on the run. Meanwhile, as Alexander Kirk's medical condition worsens, Liz seeks guidance from Cooper on a crucial decision.

Red pressures Dr. Shaw to locate a former patient. Liz contemplates the implications of her ties to an increasingly desperate and dangerous Alexander Kirk. Mr. Kaplan comes to a critical realization about her future.