Liz is abducted by a man claiming to be her father, prompting Red's desperate efforts to find her.

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 organization.

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.

A deadly assault on a seafood processing plant reveals it as a front for Libyan terrorists. Identity of the assault leader shocks the bureau.

A new case arrives at Liz's doorstep, where someone has left a diorama depicting a crime soon to be committed. Meanwhile, Red explores a new business opportunity.

Liz infiltrates an elite gang of female thieves as they prepare for their next heist, but she must first prove herself to the group's leader. Meanwhile, unexpected problems plague Red's operations, and Tom focuses on fatherly duties.

The team tracks down a killer who imparts a fatal disease on her victims.

The task force targets a sophisticated criminal who's been aiming at Red's businesses. Meanwhile, Tom goes on the hunt for information about his past.

Aram goes undercover to find a criminal who makes crimes for a profit; Tom continues to look for details about his past; Red attempts to find the source of his compromised business operations.

Red has to figure out who betrayed him when he's poisoned; Liz and the task force look for the toxin's designer to save Red's life.

Memories of the past set Red (James Spader) on a dangerous collision course with an enemy determined to destroy his criminal empire.

The task force chases an artful bounty hunter employed to target Red's closest associates. Meanwhile, Ressler faces a moral dilemma while taking on a new assignment with a former colleague.

Red sets the Task Force to trace a Blacklister with tools to manipulate memories, causing Liz to questions her own experience. When Gale intensifies his investigation, Ressler gets a new lead on a case.

When Liz becomes the target of a mercenary, the Debt Collector, Red turns to an unlikely source for help. Meanwhile, Ressler faces a complication in his efforts to stay ahead of Gale's investigation.

Facing a crippling siege on his organization, Red tracks a thief enlisted by Mr Kaplan for a mysterious assignment. Agent Gale takes extreme measures in his investigation into the conduct of his Task Force.

Red sets a risky plan in motion to save the Task Force. With the future of the Task Force in jeopardy, Liz confronts the biggest questions about her past.