Family's who have serial killers in their family reach out to the victims families to express their deepest sympathies. 1, Happy Face Killer: Keith Jesperson 笑脸杀人魔 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. 2, Spokane Serial Killer: Robert Yates 斯波坎连环杀手 Amber and Michelle Yates--daughters of serial killer Robert Lee Yates, Jr. -- 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. 3, Phoenix Serial Shooter: Dale Hausner 凤凰城连环枪手 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. 4, DC Sniper: John Allen Muhammad 华盛顿狙击手 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. 5, Classified Ad Rapist: Bobby Joe Long 分类广告强奸犯 Cindy Brown reveals how her childhood sweetheart and husband, Bobby Joe Long, evolves into a fiend who rapes more than 50 women, ultimately killing 10. Their son Chris, talks on camera for the first time, revealing his struggle as a serial killer's child. 6, Killer Clown: John Wayne Gacy 小丑杀手 Karen Kuzma--sister of John Wayne Gacy--comes out of the shadows to reveal intimate details of one of the world's most notorious serial killers.