Frank and Micro go looking for answers from a reluctant witness. Madani and Sam learn of a looming investigation. Rawlins sees a ghost.

Frank skips the subtlety while interrogating Micro. Brutal memories of top-secret missions shed light on Frank’s past.

A mysterious phone call forces Frank’s hand. Meanwhile, Madani goes digging for suspects and Curtis delivers a message.

To glean insight into the elusive BTK killer, Bill and Holden interview the Son of Sam, who makes a startling admission.