The inside story of the world's most notorious cults.

The strange and sinister world of cults is a source of endless fascination. Their secrets, rituals and shadowy hierarchies make for some of the most disturbing and shocking revelations in history. Most chilling of all is the fact that many of their followers forfeit all independence in order to carry out the often sadistic bidding of a mysterious master manipulator - and continue to defend their leader to this day.

From Charles Manson, who instructed his followers to murder seven people, including a heavily pregnant Sharon Tate, to Aum Shinrikyo, the Japanese doomsday cult that carried out deadly terror attacks, and the People's Temple, these cults and their leaders transfix us with their extreme ability to commit savage acts of cruelty and depravity in the name of a self-appointed higher power.

Many shocking and international cults are brought to life, including:

- The Manson Family

- People's Temple

- Colonia Dignidad

- Thuggees

- Aum Shinrikyo

- Skopsty

- Raelism

- Heaven's Gate