For our latest BONUS episode, we are joined by author, chemist and science communicator Dr Kathryn Harkup to talk about science behind our favourite poisons, Agatha Christie's penchant for cyanide, and the deadly cosmetics that lurked in Victorian homes...

This week we delve into the dark, deceptive world of Mary Bateman, a murderer and con artist who came to be known as the Yorkshire Witch. How did this cunning woman become so notorious across Yorkshire, how did she dupe so many innocent people with her witchy ways, and what can we learn from the Prophet Hen of of Leeds???

Dive into our our gruesome tale with our cocktail of the week.

The secret ingredient is...honey

We're heading to Depression-era Philadelphia to expose the terrible deeds and mystical dealings of The Philadelphia Poison Ring, a murderous gang responsible for at least 30 deaths in the 1930s. What black magic did these criminals weave, why did they love sandbags so much and did they prove that love really is the greatest poison of them all?

This week's secret ingredient was....LOVE of course!

We're returning to Renaissance Europe for the second part of Nick's Aqua Tofana tales, and how it led to the ghastly downfall of the opulent, scheming Marquise de Brinvilliers. How did she learn the secret of the world's most feared poison, what horrors befell her accomplices, and just how fancy were all of her party wigs?

This week's secret ingredient is...water

Can you imagine a more Victorian villain than Dr Thomas Neill Cream, the Lambeth Poisoner? We delve into his incredible story in this mammoth episode, looking at his life in Canada, USA and England. What fuelled his hatred of prostitutes, was he ever successful at blackmailing and is this week's cocktail is actually the greatest poison of them all (for Nick)?

This week's secret ingredient is...Guinness!

In our first bonus episode, we delve a little deeper into the case of Mary Ann Cotton (covered in Ep 10) with expert witness, psychotherapist and personality disorder specialist Roanna Bond.

We ponder what drives a person to kill, the appeal of arsenic in the Victorian age, what might have driven Mary Ann to commit her crimes and why Cracker is the best detective show of all time...

It's best to finish Ep 10 before listening to this one, and be warned some sensitive subjects will be discussed.

It's Episode 10 and we're celebrating reaching double digits with the story of one of the most famous poisoners of the Victorian age - serial killer Mary Ann Cotton.

Did she really kill as many as 21 adults and children during her lifetime, or was her interest in life insurance just a coincidence? And will we survive Nick's deadly cocktail...?

This first of 2 episodes on this case, so let's dive into this juicy tale.

This week's secret ingredient is...arsenic?!!!

This week we're going all the way back to the blood-soaked streets of the Roman Empire to tell the tale of lamentable lady Locusta - the world's first serial killer - and her employer Agrippina The Younger. Learn how they used feathers, mushrooms and hot wine to bring one of history's most notorious emperors to power, and prepare to be horrified and puzzled at how Locusta eventually met her end...

This week's secret ingredient is....a feather!

This week we discuss the famous incident known as the Bradford Sweets Poisoning of 1858, in which 21 people perished.

What caused the poisoning of so many poor souls? Who was really responsible? And are you minty fresh?

Our secret ingredient of the week is... peppermint.

This week we take a look at Dr George Henry Lamson, the Wimbledon poisoner and once respected surgeon turned murderer, who poisoned his brother-in-law, Percy. We discuss the nature of poison, and the tragic fall of Lamson due to his morphine addiction and desperation for money. Meanwhile, an almond martini inspired by the story's Dundee cake is mixed and tasted…with mixed reviews.