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And here he is, original.

Each week, we decide who's to blame for historical tragedy.

And each week, you tell us if we got it right.

My name is Rebecca Delgado-Smith, and this is The Aftermath.

Hey everyone, thanks for tuning in to this episode of The Aftermath.

Today, we're speaking with guest expert, Deborah Blum.

Deborah is a Pulitzer Prize-winning American science journalist,

columnist and author of six books, including The Poison Squad

and The Poisoners Handbook.

Let's hear what she has to say about Mary Ann Cotton

and her weapon of choice, Arsenic.

Hi Deborah, we're so happy to have you back on the show

to talk more about poison.

Hi Rebecca, I'm so excited to be here.

...