In this first episode Sara's taking on a subject that fascinates and intrigues as much as it repels us: Murder. Happily the human animal is much more of a pacifist than lots of our other mammal relations, including Meerkats (the adverts have lied to us). But even the most patient among us has probably been driven to murderous thoughts on occasion, especially when your sister steals your clothes. From sibling rivalry, to pair bonding this is an informative and funny look at one of the darker aspects of human behaviour.