S3 E1 · Young Blood

11-year-old Mary Bell strangled two young boys.

S3 E2 · Blood for Money

Eva Coo and Martha Clift bludgeoned a man to death for the insurance money.

S3 E3 · The Disturbed

Psychopathic nurse Jane Toppan murdered 31 of her patients.

S3 E4 · Behind the Mask

Pensioners Helen Golay and Olga Rutterschmidt killed homeless men for insurance money.

S3 E5 · Forbidden Love

12-year-old 'J.R.' murdered her family with the help of her 23-year-old boyfriend.

S3 E6 · Hearts of Darkness

Winnie Ruth Judd boarded a train with a grisly secret in her luggage.

S3 E7 · Evil Influence

Charles Manson convinced a group of women to commit murder.

S3 E8 · Fatal Obsession

Lisa Montgomery murdered a pregnant woman.

S3 E9 · Lethal Lovers

Martha Beck and her boyfriend lured girls to their graves.

S3 E10 · Mothers Who Kill

Waneta Hoyt smothered her baby and blamed SIDS.

S3 E11 · Born Bad

Gertrude Baniszewski and her children tortured their 16-year-old lodger to death.

S3 E12 · Lethal Vengeance

Piper Rountre murdered her ex-husband.

S3 E13 · Blood Lines

Barbara Opel convinced her children and their friends to kill a 64-year-old man with terminal cancer.