Fitz races to find a linguistic connection that will secure an arrest warrant while the FBI closes in on Ted’s cabin in Montana.

Fitz receives linguistic proof that Ted is the Unabomber. He tracks down Ted’s brother David, who is astonished at the accuracy of Fitz’s profile.

The Unabomber will stop bombing if his Manifesto is published. Fitz pushes for publication with S.A.C. Ackerman, who presents Fitz’s argument to Attorney General Janet Reno.

After Will sees something terrible on trick-or-treat night, Mike wonders whether Eleven’s still out there. Nancy wrestles with the truth about Barb.