Will tries to figure out who Kurt was working for, and he returns to Claire's so they can crack the rest of the ciphered list together. Other ominous, interested parties give the FBI investigation team reason to be concerned about who this crypto-analyst "Will" actually is and which side he's on.

Will reconnects with daughter Anna and she promises to keep his secret. The FBI talk with Will's ex-wife and daughter and their frenzy to catch Will increases when Will and Claire slip up and blow their cover. Meanwhile, Will deciphers the next target on The List.