Join comedians Rachel Fairburn and Kiri Pritchard-McLean as they explore a shared passion, serial killers. Each episode the pair will talk all things murder and macabre and have a right laugh doing it. Episode 78 looks at one of the UK's first female serial killers, Mary Ann Cotton. This serial poisoner had a grim old life but she made a lot of people's lives even worse. Of course, Rachel and Kiri get distracted by naked attraction with skeletons, kids in pubs and Victorian sex.