2. Vengeful Wives

For over three decades, Alamance County in North Carolina was plagued by a toxic preacher's daughter with a troubled past. One by one, the men in Blanche Moore's orbit suffered slow, agonizing deaths.

3. Sweet Treats

In the spring of 1954, one man's lust would lead to deception and death, with the help of an obscure but deadly insect, the Spanish fly.

4. Malignant Narcissists

What should have been the relaxing end to a balmy day along the Egyptian Nile... became a hellish nightmare for one innocent business woman, when pathological liar, John Allan, was intent on her murder.

5. No Remorse

From a young age Graham Young was interested in chemistry, forensic science and toxicology. He managed to acquire poisons from local chemists and put them to the test to see how it affected the people around him - starting with his family.

6. Collecting the Cash

In 1958, the town of Macon, Georgia changed forever when voluptuous, voodoo-loving restauranteur, Anjette Lyles, stood trial for murder. Her restaurant was incredibly popular and Anjette was the perfect host, but underneath that welcoming, warm hearted exterior was a harsh, cold blooded murderer.

7. Killing Them Softly

Richard Overton led a double life, marrying whilst already married. It's a scam he led for a year and a half, but his downfall led to divorce from his first wife and an annulment from his second.

8. Deluded Trust

One Saturday in July 2006, prominent Nevada state politician Kathy Augustine, was supposed to attend a political fundraiser, but she never showed up. She lay dying in her bedroom. Her husband, Chaz Higgs, may have thought he'd planned a perfect murder, but the former US Navy medic, turned nurse, came to learn that loose lips do indeed sink ships.

9. Lethal Lovers

Ellie Tran's ex-boyfriend, Joseph Merlino III was an aggressive and ruthless poisoner. He chose to take the life of the mother of his daughter by attacking her in the driveway of her home with a syringe filled with cyanide - on Valentine's Day.

10. Wives and Lies

Audrey Marie Hilley's husband, Frank Hilley, supposedly died of infectious hepatitis in 1975. He had been ill for some time, but because his symptoms aligned with hepatitis, no tests for poison were carried out. Audrey Marie's daughter then became ill - eventually her physician suspected heavy metal poisoning.

11. Double Deceit

When Orange County detective, Yvonne Shull, opened up Linda Curry's cold case file, it began a seven year journey into the toxic machinations of a consummate liar. Linda Curry's family were certain the murderer was her husband - they believed he had been slowly poisoning her to death. They were right.

12. Concealing the Truth

Larry McNabney was murdered in September, 2001, but his death was so well concealed that no one reported him missing for almost three months.

13. Toxic Affairs

Joe Cinque lived in Canberra with his girlfriend, Anu Singh, who was studying law the Australian National University. They were both young and set for a bright future. However, it all took a turn for the worse when Anu Singh began to declare to a select few friends that she was going to kill her boyfriend - it was a supposed suicide pact, only it seems Joe didn't know about it.