S4 E1 · An Eye For An Eye

Karla Faye Tucker murdered her ex-boyfriend and his lover with a pickaxe.

S4 E2 · Outlaws

Drug lord Griselda Blanco had over 100 people murdered in Miami.

S4 E3 · Fortune Hunters

Jill Coit killed her eleventh husband after he found out about her previous marriages.

S4 E4 · Dangerous Liaisons

14-year-old Caril Fugate and her boyfriend went on a deadly killing spree.

S4 E5 · Till Death Do Us Part

Mary Winkler shot her pastor husband, claiming she'd suffered years of abuse.

S4 E6 · Master Manipulators

After stealing her husband's money, Sharon Nelson got her lover to kill him before moving to another man.

S4 E7 · The Sacred Bond

Theresa Knorr suffered delusions that led her to murder her daughters.

S4 E8 · Beyond Suspicion

Fortune teller Tillie Gburek took deadly measures to ensure her predictions came true.

S4 E9 · In Cold Blood

Wendi Mae Davidson injected her husband with drugs used to euthanise animals.

S4 E10 · Under His Control

Jennifer Reali's lover used the Bible to convince her to murder his wife.

S4 E11 · Secrets and Lies

Anjette Lyles poisoned four members of her family.

S4 E12 · Love Gone Wrong

Christine Paolilla's lover convinced her to murder her friends.

S4 E13 · A Daughter's Revenge

Straight-A student Nicole Kasinskas killed her mother for keeping her from her boyfriend.

S4 E14 · Love Sick

Lisa Michelle Lambert stalked and killed the teenager her boyfriend raped.

S4 E15 · Married to Murder

After being caught embezzling millions, Amy Bosley killed her husband and staged a break-in.

S4 E16 · Teen Killers

Susanna Toledano, Chelsea Richardson and Andrew Wamsley murdered Andrew's parents.