Melissa Moore--daughter of Keith Hunter Jesperson, infamously known as the Happy Face Killer tells her own personal story as the daughter of a serial killer. The episode reveals shocking behind-the-scenes accounts of what it was like growing up with a father who, she later learned, was committing horrific murders.

Amber and Michelle Yates--daughters of serial killer Richard Yates--tell the inside story of being raised by a man who terrorized the city of Spokane, Washington. The episode reveals devastating details and chilling home videos of a strict father who disciplines his children by day, and hunts innocent women by night.

Randy Hausner--brother of serial shooter Dale Hausner--shares the inside story of a man who terrorized the city of Phoenix in a year and a half-long killing spree. He reveals his brother's never before seen journal disclosing a chilling view on the development of a killer.

Mildred Muhammad--ex-wife of infamous DC Sniper John Allen Muhammad--reveals how the man she loves disintegrated into a monster who threatens to kill her.