Episode one of Bad Nanny introduces the audience to one of Samantha Cookes' most brazen personas - Carrie Jade Williams, a supposedly terminally ill, award-winning author. From this shocking disguise, the documentary traces back through the years to uncover how Samantha's cons became increasingly audacious, building up to her role as a "nanny" who was hiding a troubling secret. The documentary shows how she gained the trust of families, only to betray them in devastating ways.