On the surface Dennis Rader seems like a regular guy, but what lies beneath is a sinister fantasy life he enacts under the guise of his alter ego, BTK, while terrorizing Wichita, Kansas.

The murderous crime spree of BTK continues as there were seemingly no signs from his upbringing that would indicate he would become a serial killer.

Dr Katherine Ramsland gets first-hand insight into the mind of the BTK Killer, Dennis Rader, and the fatal mistake that led to his capture.